Plugging structure for multiple dewatering wells of super-thick raft
By using steel casing and sealing concrete in the ultra-thick raft slab combined with V-ring plate design, the impact of PVC material precipitation well pipes on the steel bar arrangement is solved, and efficient sealing and waterproofing effects are achieved to ensure the smooth progress of construction.
Patent Information
- Application Number
- CN202422713336.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-11-07
AI Technical Summary
Traditional PVC material precipitation well pipes affect the layout of steel bars in super-thick rafts, poor sealing effect, reduce the quality of concrete pouring, and increase construction costs and construction period.
The steel casing and sealing concrete are designed in combination with V-ring plates, and sealing gaskets and shrink-free grouting material sealing strips are used to form a multiple precipitation well sealing structure to ensure tight connections and strong waterproofing capabilities.
It effectively solves the cross-operation problems during steel bar binding and concrete pouring, improves the sealing effect, reduces the risk of water seepage, and saves construction period and costs.
Smart Images
Figure CN223269258U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building construction, in particular to a multi-dewatering well blocking structure for an ultra-thick raft plate. Background Art
[0002] With the rapid development of high-rise buildings, piled raft foundations are increasingly being used for super-high-rise buildings, and the depth of raft slabs is also increasing. This inevitably leads to the problem of water drainage. For non-enclosed water drainage methods, if appropriate sealing methods are not adopted when there are a large number of pipe wells, not only will the sealing effect be poor, increasing construction safety risks, but it will also reduce the operating space and affect the normal construction process of the raft slab. If PVC water drainage pipes are used, this will have a significant impact on the arrangement of raft slab reinforcement, reducing the bond strength between the raft slab and the concrete, reducing the quality of the raft slab concrete pouring and the sealing effect, and increasing the project cost and construction period. Utility Model Content
[0003] The purpose of the utility model is to provide a multiple drainage well sealing structure for ultra-thick raft slabs, and to solve the technical problems that the drainage well sealing structure in the traditional PVC drainage well pipe has a great influence on the arrangement of raft slab steel bars, has a poor sealing effect, and reduces the quality of raft slab concrete pouring.
[0004] In order to achieve the above-mentioned purpose, the present utility model adopts the following technical solutions.
[0005] A multiple precipitation well sealing structure for an ultra-thick raft, used for sealing precipitation well pipes; the precipitation well pipes are made of PVC material; the multiple precipitation well sealing structure includes a steel casing and sealing concrete; the upper end of the precipitation well pipe is flush with the top surface of the soil at the bottom of the raft, and a lower ring plate is provided on the upper part of the precipitation well pipe, near the upper end; the cross-section of the lower ring plate is V-shaped; a groove is dug at the top of the soil, around the precipitation well pipe; the lower ring plate is located in the groove; the steel casing is sleeved on the upper part of the precipitation well pipe, and an upper ring plate is provided at the bottom of the steel casing; the cross-sectional shape of the upper ring plate is adapted to the cross-sectional shape of the lower ring plate, and Sealing gaskets are arranged between the ring plates; the sealing gaskets are bonded to the lower ring plate and the upper ring plate with sealant; the groove is filled with a self-repairing concrete layer; a cushion layer, a cold primer layer, a waterproof layer and a waterproof protective layer are arranged in sequence from bottom to top between the top of the soil and the raft plate; a non-shrinkage grouting material sealing strip is provided at the joint between the cold primer layer and the steel casing; the waterproof layer is provided with a hole at the position of the steel casing, and the waterproof layer around the hole extends upward to cover the outer wall of the steel casing; sealant is provided at the joint between the waterproof layer and the steel casing; a water-stop ring plate is provided on the position of the steel casing in the raft plate; the well-sealing concrete is filled in the dewatering well pipe and the steel casing.
[0006] Preferably, the plane of the groove is rectangular or circular, the plane size of the groove is 500mm to 800mm, and the depth of the groove is 300mm to 500mm.
[0007] Preferably, the diameter of the steel casing is 5 mm to 10 mm larger than the diameter of the precipitation well pipe; and the length of the steel casing outside the precipitation well pipe is at least 20 mm.
[0008] Preferably, the cross-section of the non-shrinkage grouting material sealing strip is a right triangle, and the hypotenuse of the right triangle is an arc-shaped side.
[0009] Preferably, the height of the portion where the waterproof layer covers the outer wall of the steel casing is not less than 20 cm.
[0010] Preferably, the upper end of the steel casing is located inside the raft or exceeds the top surface of the raft;
[0011] When the upper end of the steel casing is located in the raft, the upper end of the steel casing is located between the lower steel mesh and the upper steel mesh of the raft; there is one water stop ring plate, and the water stop ring plate is provided above the lower steel mesh and close to the lower steel mesh;
[0012] When the upper end of the steel casing exceeds the top surface of the raft slab, a group of waterstop ring plates are provided, and a group of waterstop ring plates are vertically spaced between the lower steel mesh and the upper steel mesh, and the spacing between adjacent waterstop ring plates is not more than 1m.
[0013] Compared with the prior art, the present invention has the following characteristics and beneficial effects.
[0014] 1. The purpose of the present invention is to provide an ultra-thick raft slab multiple drainage well sealing structure. Before and after the construction of the raft slab cushion layer, the original PVC drainage well pipe is cut off and replaced with a drainage well steel casing with a steel water stop ring welded on it, and the foundation bottom plate waterproof protective layer is carried out. The present invention adopts a lower ring plate with a V-shaped cross-section on the upper part of the drainage well pipe, near the upper end, and an upper ring plate with a V-shaped cross-section is provided at the bottom of the steel casing. The design of the V-shaped connecting ring plate can ensure close contact between the connection parts, avoid the generation of connection seams between the drainage well and the steel casing, provide a preliminary sealing effect, and prevent water seepage. At the same time, the V-shaped design will produce a self-locking effect when subjected to force, which helps to further enhance the stability of the connection, thereby improving the waterproof ability. In addition, the utility model is provided with a non-shrinkage grouting material sealing strip at the joint between the cold primer layer and the steel casing, the waterproof layer is opened with a hole at the position of the steel casing, and the waterproof layer around the hole extends upward to cover the outer wall of the steel casing; the design of this structure further prevents water from being retained in the connection part and reduces the risk of water seepage.
[0015] The utility model arranges a V-shaped lower ring plate on the upper part of the precipitation well pipe, near the upper end, and arranges a V-shaped upper ring plate at the bottom of the steel casing, and at the same time arranges a sealing gasket between the lower ring plate and the upper ring plate. This connection structure avoids the generation of connection seams between the precipitation well and the steel casing, provides a preliminary sealing effect, and prevents water seepage; at the same time, a waterproof layer is arranged above the connection part, and a non-shrinkage grouting material sealing strip is arranged at the bottom of the waterproof layer and at the joint between the cold primer oil layer and the steel casing. This waterproof structure further improves the sealing effect.
[0016] 2. The ultra-thick raft slab multiple dewatering well sealing structure of the present invention can effectively solve the problem of cross-operation with dewatering during the raft slab reinforcement binding and raft slab concrete pouring process, ensure continuous dewatering work during the raft slab construction process, and avoid the occurrence of bubbling. Moreover, the structure is simple to construct, and the steel casing material and the welded water stop ring plate are processed and formed in one time. For the case where the ultra-thick raft slab has a large number of steel bar layers and is densely arranged, the top of the low-area raft slab steel casing will be placed between the bottom and top steel bars to avoid affecting the steel bar arrangement, thereby saving construction time and cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The present invention will be further described in detail below with reference to the accompanying drawings.
[0018] Figure 1 It is a vertical cross-sectional structural diagram of the multiple dewatering well plugging structure when the upper end of the steel casing is located in the raft plate in the utility model.
[0019] Figure 2 It is a schematic diagram of the vertical cross-sectional structure of the multiple dewatering well plugging structure when the upper end of the steel casing exceeds the top of the raft plate in the utility model.
[0020] Figure 3 It is a schematic diagram of the connection structure between the dewatering well pipe and the steel casing in the utility model.
[0021] Figure numbers: 1-dewatering well pipe, 2-steel casing, 3-well sealing concrete, 4-raft slab, 4.1-lower steel mesh, 4.2-upper steel mesh, 4.3-raft slab concrete, 5-soil, 6-lower ring plate, 7-upper ring plate, 8-groove, 9-sealing gasket, 10-self-repairing concrete layer, 11-cushion, 12-cold primer layer, 13-waterproof layer, 14-waterproof protective layer, 15-non-shrinkage grouting material sealing strip, 16-waterstop ring plate. DETAILED DESCRIPTION
[0022] like Figure 1-3As shown, this multiple precipitation well sealing structure for super-thick raft slabs is used to seal the precipitation well pipe 1; the precipitation well pipe 1 is made of PVC material; the multiple precipitation well sealing structure includes a steel casing 2 and a sealing concrete 3; the upper end of the precipitation well pipe 1 is flush with the top surface of the soil 5 at the bottom of the raft slab 4, and a lower ring plate 6 is provided on the upper part of the precipitation well pipe 1, near the upper end; the cross-section of the lower ring plate 6 is V-shaped; a groove 8 is dug at the top of the soil 5, located around the precipitation well pipe 1; the lower ring plate 6 is located in the groove 8; the steel casing 2 is sleeved on the upper part of the precipitation well pipe 1, and an upper ring plate 7 is provided at the bottom of the steel casing 2; the cross-sectional shape of the upper ring plate 7 is adapted to the cross-sectional shape of the lower ring plate 6, and a sealing gasket 9 is provided between the upper ring plate 7 and the lower ring plate 6; the sealing gasket 9 is glued to the lower ring plate 6 and the upper ring plate 7 The groove 8 is filled with a self-repairing concrete layer 10; a cushion layer 11, a cold primer layer 12, a waterproof layer 13 and a waterproof protective layer 14 are arranged in sequence from bottom to top between the top of the soil 5 and the raft slab 4; a non-shrinkage grouting material sealing strip 15 is provided at the joint between the cold primer layer 12 and the steel casing 2; the waterproof layer 13 is provided with a hole at the position of the steel casing 2, and the waterproof layer 13 around the hole extends upward to cover the outer wall of the steel casing 2; in this embodiment, the upper edge of the waterproof layer 13 covering the outer wall of the steel casing 2 exceeds the top surface of the waterproof protective layer 14; sealant is provided at the joint between the steel casing 2 and the steel casing 2; a water stop ring plate 16 is provided on the position of the steel casing 2 in the raft slab 4; the well-sealing concrete 3 is filled in the dewatering well pipe 1 and the steel casing 2; the grade of the well-sealing concrete 3 is not lower than the concrete grade of the raft slab 4.
[0023] In this embodiment, the raft 4 has a thickness of 2m to 8m and comprises a lower steel mesh 4.1, an upper steel mesh 4.2 and raft concrete 4.3.
[0024] In this embodiment, the plane of the groove 8 is rectangular or circular, the plane size of the groove 8 is 500 mm to 800 mm, and the depth of the groove 8 is 300 mm to 500 mm.
[0025] In this embodiment, the diameter of the steel casing 2 is 5 mm to 10 mm larger than the diameter of the dewatering well pipe 1 ; the length of the steel casing 2 sleeved on the outside of the dewatering well pipe 1 is at least 20 mm.
[0026] In this embodiment, the cross-section of the non-shrinkage grouting material sealing strip 15 is a right triangle, and the hypotenuse of the right triangle is an arc-shaped side, which facilitates the tight connection between the steel casing 2 and the waterproof layer 13.
[0027] In this embodiment, the height of the portion where the waterproof layer 13 covers the outer wall of the steel casing 2 is not less than 20 cm.
[0028] In this embodiment, for the situation where multiple pouring and dewatering of an ultra-thick raft slab occurs simultaneously, the dewatering well has two sealing methods: one that does not pass through the raft slab 4 and the other that passes through the raft slab 4. That is, the upper end of the steel casing 2 is located inside the raft slab 4 or exceeds the top surface of the raft slab 4.
[0029] When the upper end of the steel casing 2 is located in the raft 4, the upper end of the steel casing 2 is located between the lower steel mesh 4.1 and the upper steel mesh 4.2 of the raft 4; there is one water stop ring plate 16, and the water stop ring plate 16 is provided above the lower steel mesh 4.1 and close to the lower steel mesh 4.1;
[0030] When the upper end of the steel casing 2 exceeds the top surface of the raft 4, a group of water stop ring plates 16 is provided, and a group of water stop ring plates 16 is vertically spaced between the lower steel mesh 4.1 and the upper steel mesh 4.2, and the spacing between adjacent water stop ring plates 16 is not more than 1m.
[0031] In this embodiment, the lower ring plate 6 is integrally formed with the dewatering well pipe 1, and the upper ring plate 7 is integrally formed with the steel casing 2; the sealing gasket 9 is a rubber gasket or a polytetrafluoroethylene gasket; and the sealant is a silicone sealant or a polyurethane sealant.
[0032] In this embodiment, before pouring the raft foundation concrete, the dewatering well pipe 1 is cut out at the upper surface of the soil 5, and a groove 8 is dug in the dewatering well pipe 1; a steel casing 2 provided with a water stop ring plate 16 and an upper ring plate 7 is used to cover the cut-out portion; wherein, the water stop ring plate 16 and the steel casing 2 are in the form of a full weld; the diameter of the water stop ring plate 16 is not less than 300 mm, and the thickness of the water stop ring plate 16 is not less than 3 mm.
[0033] A sealing gasket 9 is set between the upper ring plate 7 and the lower ring plate 6, and the sealing gasket 9 is bonded to the lower ring plate 6 and the upper ring plate 7 with sealant; then the groove 8 is filled and the cushion layer 11 of the raft plate 4 is poured. After the concrete solidifies, cement mortar is used to grade the slope along the four sides, and a cold primer layer 12 is applied to enhance the adhesion between the waterproof layer 13 and the concrete. A non-shrinkage grouting material sealing strip 15 is set at the joint between the cold primer layer 12 and the steel casing 2; the waterproof layer 13 adopts APP modified asphalt waterproof membrane; geotextile is laid on the top of the waterproof layer 13, and then the waterproof protective layer 14 is constructed. Finally, sealant is set at the joint between the waterproof layer 13 and the steel casing 2.
[0034] After the steel casing 2 is secured, the wells that do not pass through the raft are filled with sealing concrete 3 of the same grade as the raft concrete 4.3. The lower and upper layers of the raft 4 are then tied together. The steel casing 2 is positioned between the lower and upper layers, ensuring no impact on the pouring of the raft concrete 4.3. For wells that pass through the raft, the sealing operation is performed after the raft concrete 4.3 is completed.
[0035] In this embodiment, before the cushion layer 11 is constructed, the dimensions of the steel casing 2 and the dewatering well pipe 1 need to be accurately measured in advance.
[0036] The above embodiments are not exhaustive of specific implementation methods, and there may be other embodiments. The purpose of the above embodiments is to illustrate the present invention rather than to limit the scope of protection of the present invention. All applications derived from simple variations of the present invention fall within the scope of protection of the present invention.
Claims
1. A multi-well plugging structure for ultra-thick rafts, used for plugging a well pipe (1); the well pipe (1) is made of PVC material; the multi-well plugging structure comprises a steel casing (2) and well-sealing concrete (3); and is characterized in that: The upper end of the precipitation well pipe (1) is flush with the top surface of the soil (5) at the bottom of the raft (4), and a lower ring plate (6) is provided on the upper part of the precipitation well pipe (1) near the upper end; the cross section of the lower ring plate (6) is V-shaped; a groove (8) is dug on the top of the soil (5) and around the precipitation well pipe (1); the lower ring plate (6) is located in the groove (8); the steel casing (2) is sleeved on the upper part of the precipitation well pipe (1), and an upper ring plate (7) is provided at the bottom of the steel casing (2); the cross section of the upper ring plate (7) is adapted to the cross section of the lower ring plate (6), and a sealing gasket (9) is provided between the upper ring plate (7) and the lower ring plate (6); the sealing gasket (9) is bonded to the lower ring plate (6) and the upper ring plate (7) by using a sealing adhesive; the groove (8) ) is filled with a self-repairing concrete layer (10); a cushion layer (11), a cold primer layer (12), a waterproof layer (13) and a waterproof protective layer (14) are arranged in sequence from bottom to top between the top of the soil body (5) and the raft (4); a non-shrinkage grouting material sealing strip (15) is provided at the joint between the cold primer layer (12) and the steel casing (2); the waterproof layer (13) is provided with a hole at the position of the steel casing (2), and the waterproof layer (13) around the hole extends upward to cover the outer wall of the steel casing (2); a sealant is provided at the joint between the waterproof layer (13) and the steel casing (2); a water stop ring plate (16) is provided on the portion of the steel casing (2) located in the raft (4); the well sealing concrete (3) is filled in the dewatering well pipe (1) and the steel casing (2).
2. The plugging structure for multiple precipitation wells on ultra-thick rafts according to claim 1 is characterized in that: The plane of the groove (8) is rectangular or circular, the plane size of the groove (8) is 500 mm to 800 mm, and the depth of the groove (8) is 300 mm to 500 mm.
3. The plugging structure for multiple precipitation wells on ultra-thick rafts according to claim 1 is characterized in that: The diameter of the steel casing (2) is 5 mm to 10 mm larger than the diameter of the precipitation well pipe (1); and the length of the steel casing (2) sleeved on the outer portion of the precipitation well pipe (1) is at least 20 mm.
4. The plugging structure for multiple precipitation wells on ultra-thick rafts according to claim 1 is characterized in that: The cross section of the non-shrinkage grouting material sealing strip (15) is a right triangle, and the hypotenuse of the right triangle is an arc-shaped side.
5. The plugging structure for multiple precipitation wells on ultra-thick rafts according to claim 1 is characterized in that: The height of the portion where the waterproof layer (13) covers the outer wall of the steel casing (2) is not less than 20 cm.
6. The plugging structure for multiple precipitation wells on ultra-thick rafts according to claim 1 is characterized by: The upper end of the steel casing (2) is located inside the raft plate (4) or exceeds the top surface of the raft plate (4); When the upper end of the steel casing (2) is located in the raft (4), the upper end of the steel casing (2) is located between the lower steel mesh (4.1) and the upper steel mesh (4.2) of the raft (4); one water stop ring plate (16) is provided, and the water stop ring plate (16) is provided above the lower steel mesh (4.1) and close to the lower steel mesh (4.1); When the upper end of the steel casing (2) exceeds the top surface of the raft (4), a group of water-stop ring plates (16) is provided, and a group of water-stop ring plates (16) is vertically spaced between the lower steel mesh (4.1) and the upper steel mesh (4.2), and the spacing between adjacent water-stop ring plates (16) is not greater than 1m.