Anti-seepage formwork structure for unbonded prestressed anti-floating anchor rod

Abstract

The utility model relates to the technical field of constructional engineering, and discloses an anti-seepage formwork structure for an unbonded prestressed anti-floating anchor rod, which comprises a water stop steel pipe and a PVC (polyvinyl chloride) sleeve, and the water stop steel pipe is used for being arranged at the top end of an anchor bearing plate and is used for being sleeved outside the top of the anchor rod; the PVC sleeve is detachably connected to the top end of the water stop steel pipe and used for being arranged outside the top of the anchor rod in a sleeving mode, the PVC sleeve comprises a first semicircular part and a second semicircular part which are arranged in a split mode, and the first semicircular part and the second semicircular part are symmetrically arranged in the radial direction of the PVC sleeve and connected through a locking assembly. And therefore, the damage to the foundation when the underground water level rises too much is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of building engineering, concretely relates to a water seepage prevention formwork structure for unbonded prestressed anti-floating anchor rod. BACKGROUND

[0002] With the acceleration of urbanization, the development and utilization of underground space are increasing, especially in high-rise building and large infrastructure construction, unbonded prestressed anti-floating anchor rod as an important foundation reinforcement and anti-floating structure, its application is more and more widely. In the anchor rod construction process, after the installation, grouting and other processes of anchor rod are completed, the formwork system needs to be installed at the top of the anchor rod for supporting and fixing the pouring shape of concrete, so that the anchor rod and the foundation slab form a whole, thereby transmitting the prestress to the foundation structure.

[0003] The conventional formwork system is mostly wood formwork or PVC sleeve formwork, groundwater is easy to seep along the gap, and the waterproof effect is poor, which leads to leakage when the underground water level rises a lot, and causes serious harm to the foundation. UTILITY MODEL CONTENT

[0004] Therefore, the utility model provides a water seepage prevention formwork structure for unbonded prestressed anti-floating anchor rod to solve the problem of poor waterproof effect of the existing formwork system applied to the unbonded prestressed anti-floating anchor rod, which is easy to cause great harm to the foundation when the underground water level rises a lot.

[0005] The utility model provides a water seepage prevention formwork structure for unbonded prestressed anti-floating anchor rod, which comprises:

[0006] The water stop steel pipe is arranged at the top end of the anchor pad and is sleeved on the top of the anchor rod.

[0007] The PVC sleeve is detachably connected to the top end of the water stop steel pipe and is sleeved on the top of the anchor rod, the PVC sleeve comprises a first semicircular part and a second semicircular part arranged in two parts, the first semicircular part and the second semicircular part are arranged symmetrically along the radial direction of the PVC sleeve and are connected through the locking assembly.

[0008] The water seepage prevention formwork structure for unbonded prestressed anti-floating anchor rod has at least the following beneficial effects:

[0009] By installing a water-stop steel pipe between the anchor plate and the PVC sleeve, when the groundwater level rises, water seeps upwards along the anchor holes until it reaches the water-stop steel pipe and cannot continue to seep in, thus cutting off the water seepage path. This greatly enhances the waterproofing effect of this anti-seepage formwork structure and reduces the damage to the foundation when the groundwater level rises significantly. At the same time, by detachably connecting the PVC sleeve and the water-stop steel pipe, and by dividing the PVC sleeve into a first semicircle and a second semicircle, the PVC sleeve can be removed and reused after the formwork is erected and the concrete is poured. This saves construction costs and conforms to the construction concept of green construction sites.

[0010] In one optional embodiment, the inner wall of the water-stop steel pipe is provided with a water-stop ring, which is disposed at one end of the water-stop steel pipe that is relatively close to the PVC sleeve.

[0011] In one optional embodiment, the water-stop ring extends radially from the outside to the inside along the water-stop steel pipe, and the water-stop ring is gradually inclined downward.

[0012] In one optional embodiment, the PVC sleeve is coaxially arranged with the water-stop steel pipe; a connector is provided around the top end of the water-stop steel pipe, and the PVC sleeve is sleeved on the connector and is interference-fitted with the connector.

[0013] In one alternative embodiment, the outer diameter of the connector is smaller than the outer diameter of the waterstop steel pipe.

[0014] In one optional embodiment, the outer diameter of the water-stop steel pipe is equal to the outer diameter of the PVC sleeve.

[0015] In one alternative embodiment, the connector includes a plurality of snaps arranged circumferentially spaced apart.

[0016] In one alternative implementation, the locking assembly includes:

[0017] The first insertion part is disposed on the end face of the first semicircular part facing the second semicircular part;

[0018] A first slot is disposed on the end face of the second semicircle facing the first semicircle, and the first slot matches the first insertion portion.

[0019] In one alternative embodiment, the number of the first slots is at least equal to the number of the first inserts, and a plurality of the first inserts are provided, with the plurality of the first inserts spaced axially at intervals on the first semicircle.

[0020] In one alternative implementation, the first slot is configured to be tapered, and the size of the first slot gradually decreases in the direction away from the first semicircle. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a seepage-proof formwork structure for an unbonded prestressed anti-buoyancy anchor rod, assembled onto the anchor rod according to an embodiment of the present invention.

[0023] Figure 2 This is a top view of the water-stop steel pipe in an embodiment of the present utility model.

[0024] Figure 3 for Figure 2 A schematic diagram of the front view of the cross-section structure;

[0025] Figure 4 This is an exploded structural diagram of the PVC sleeve in an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100 - Water-stop steel pipe, 110 - Water-stop ring, 120 - Connector, 121 - Clip;

[0028] 210 - Anchor plate, 220 - Anchor bolt, 230 - Anchor;

[0029] 300 - PVC sleeve, 310 - first semicircular part, 311 - first insertion part, 320 - second semicircular part, 321 - first slot. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] In the description of the present embodiment, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present embodiment. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present embodiment, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present embodiment can be understood according to the specific circumstances.

[0033] In high-rise buildings and large infrastructure construction, in order to avoid damage to the building structure caused by the buoyancy of underground water, the non-bonding prestressed anti-floating anchor rod 220 is usually used to anchor and connect with the foundation slab reinforcement, and the friction between the anchor rod 220 and the surrounding soil layer of the grouting body is used to resist the upward force; during the construction of the anchor rod 220, after the installation of the anchor rod 220 in the drilling, grouting and other processes, a formwork system needs to be installed at the top of the anchor rod 220, which is used to support and fix the pouring shape of the concrete, so that the anchor rod 220 and the foundation slab form a whole, thereby transmitting the prestress to the foundation structure. The conventional formwork system of the related art is mostly wood formwork or PVC sleeve 300 formwork, and underground water is easily infiltrated along the gap, and the waterproof effect is poor, which causes leakage when the underground water level rises a lot, causing serious harm to the foundation. In order to solve the above technical defects, the present embodiment provides a water infiltration prevention formwork structure for non-bonding prestressed anti-floating anchor rod.

[0034] The embodiments of the present application will be described below in conjunction with Figures 1 to 4 , the description of the present application.

[0035] The utility model discloses an anti -infiltration formwork structure for non -bonded type prestressed anti -floating anchor rod, including water -stop steel pipe 100 and PVC sleeve 300, water -stop steel pipe 100 is used to set up at the top of anchor pad 210, and is used to set up in the top outside of anchor rod 220, PVC sleeve 300 can be detachably connected to the top of water -stop steel pipe 100, and is used to set up in the top outside of anchor rod 220, PVC sleeve 300 includes split setting's first semicircle part 310 and second semicircle part 320, first semicircle part 310 and second semicircle part 320 along the radial symmetry of PVC sleeve 300 are set up, and are connected through locking assembly.

[0036] The anti -infiltration formwork structure of the embodiment is through setting up water -stop steel pipe 100 between anchor pad 210 and PVC sleeve 300, when the underground water level rises and makes water seep along anchor rod hole upwards until contacting water -stop steel pipe 100, cannot continue to seep, plays the role of cutting off water seep path, thereby greatly enhancing the waterproof effect of the formwork mode of the anti -infiltration formwork structure of the embodiment, and further reducing the harm caused to the foundation when the underground water level rises more, simultaneously through detachably connecting PVC sleeve 300 with water -stop steel pipe 100, and split setting PVC sleeve 300 into first semicircle part 310 and second semicircle part 320, after formwork and concrete pouring are completed, can remove and reuse PVC sleeve 300, save construction cost, and meet the construction concept of green site.

[0037] It should be noted that in the construction process of anchor rod 220, when anchor rod 220 is installed in the drill hole (also known as anchor rod hole) and grouting is carried out, due to the condition of not being vibrated densely, quality problems such as drill hole gap are easily generated between the root of anti -floating anchor rod 220 and the surrounding wall of drill hole, therefore, when the underground water level rises, underground water will seep upwards along the anchor rod hole, causing the foundation slab (such as raft, for example) to appear water seepage phenomenon.

[0038] It should be noted that after the installation of the anti -infiltration formwork structure of the embodiment is completed, and concrete is poured and solidified in water -stop steel pipe 100 and PVC sleeve 300, the locking assembly can be unlocked, so that first semicircle part 310 and second semicircle part 320 are split and removed respectively, thereby facilitating the removal and reuse of PVC sleeve 300.

[0039] It should be noted that because water -stop steel pipe 100 and PVC sleeve 300 are both standardized materials, they are quick to install and remove, have high construction efficiency and low labor intensity, and the operator does not need too high professional skill, is easy to operate, and has strong guidance and operability.

[0040] It should be noted that the water stop steel pipe 100 and the PVC sleeve 300 are two components that are split from each other, and are modular size components, which are convenient for batch modular customization in a processing factory, and then are transported to a construction site for assembly, thereby shortening a construction period.

[0041] It can be understood that after the installation of the anchor rod 220, grouting and other processes are completed, the anchor pad 210 is arranged at the top of the anchor rod 220, and the water stop steel pipe 100 is installed, in the process of installing the water stop steel pipe 100, the water stop steel pipe 100 is first erected at the top end of the anchor pad 210, and the steel strand is tensioned and then locked by the anchor device 230, and the anchor device 230 is connected to the portions of the plurality of anchor rods 220 that extend outside the top end of the anchor pad 210.

[0042] As shown in FIGS. 1 and 2, in some embodiments, the inner wall of the water stop steel pipe 100 is annularly provided with a water stop ring 110, and the water stop ring 110 is arranged at one end of the water stop steel pipe 100 that is relatively close to the PVC sleeve 300. Figure 1 and Figure 3 When underground water seeps upward along the inner wall of the water stop steel pipe 100, the flow direction of the water changes after the water contacts the connection between the water stop steel pipe 100 and the water stop ring 110, moves radially inward along the water stop ring 110, and prolongs the seepage path of the underground water, thereby effectively intercepting the upward seepage of the underground water and achieving better waterproof effect.

[0043] Specifically, the water stop ring 110 extends from outside to inside along the radial direction of the water stop steel pipe 100, and the water stop ring 110 is gradually arranged to be inclined downward. By gradually arranging the water stop ring 110 to be inclined downward inward, on the one hand, the seepage moving path of the underground water is prolonged, and on the other hand, the underground water is guided to flow downward, which is beneficial to intercept the upward seepage of the underground water. More specifically, an included angle formed between the water stop ring 110 and a horizontal plane is arranged to be 15° to 20°, that is, the concrete is not affected to be poured and filled to the water stop steel pipe 100, and the seepage moving path of the underground water is also prolonged.

[0044] Specifically, the water stop ring 110 is integrally formed with the water stop steel pipe 100, and is convenient to process.

[0045] Specifically, the water stop ring 110 is coaxially arranged at the top end of the water stop steel pipe 100, the water stop ring 110 is provided with a horizontal portion at an end of the water stop steel pipe 100 that is outward in the radial direction of the water stop steel pipe 100, and a projection of the water stop steel pipe 100 along an axial direction of the water stop steel pipe 100 falls within the horizontal portion.

[0046] As shown in FIGS. 1 and 2, in some embodiments, the inner wall of the water stop steel pipe 100 is annularly provided with a water stop ring 110, and the water stop ring 110 is arranged at one end of the water stop steel pipe 100 that is relatively close to the PVC sleeve 300. Figures 1 to 3As shown, in some embodiments, the PVC sleeve 300 is coaxially arranged with the water stop steel pipe 100; the top end of the water stop steel pipe 100 is annularly provided with a connecting piece 120, the PVC sleeve 300 is sleeved outside the connecting piece 120 and is in interference fit with the connecting piece 120. Because the first semicircular part 310 and the second semicircular part 320 are formed as a whole through the locking assembly, and the PVC sleeve 300 is detachably connected with the connecting piece 120 in interference fit, on the one hand, the PVC sleeve 300 and the water stop steel pipe 100 are assembled into an integrated body by abutting and locking the first semicircular part 310 and the second semicircular part 320, thereby providing stable and firm formwork; on the other hand, after the formwork is set and the concrete is poured, the locking assembly is unlocked and the first semicircular part 310 and the second semicircular part 320 are moved away from each other along the radial direction of the PVC sleeve 300, thereby completing the removal and reuse of the PVC sleeve 300, and the whole disassembly and assembly process is convenient to operate.

[0047] As shown in the drawings, Figure 1 Specifically, the outer diameter of the connecting piece 120 is smaller than the outer diameter of the water stop steel pipe 100; so that the projection of the PVC sleeve 300 along the axial direction of the PVC sleeve 300 at least partially overlaps the water stop steel pipe 100, effectively avoiding the displacement of the PVC sleeve 300 relative to the water stop steel pipe 100 along the axial direction during the process of pouring the concrete to fully fill the inside of the water stop steel pipe 100 and the PVC sleeve 300, thereby ensuring the provision of stable and firm formwork.

[0048] Specifically, the outer diameter of the water stop steel pipe 100 is equal to the outer diameter of the PVC sleeve 300; so that the projection of the PVC sleeve 300 along the axial direction of the PVC sleeve 300 falls entirely within the range of the water stop steel pipe 100, which is more conducive to avoiding the displacement of the PVC sleeve 300 relative to the water stop steel pipe 100 during the process of pouring the concrete to fully fill the inside of the water stop steel pipe 100 and the PVC sleeve 300, thereby ensuring the provision of stable and firm formwork.

[0049] As shown in the drawings, Figure 2 Specifically, the connecting piece 120 includes a plurality of buckles 121 arranged at intervals in the circumferential direction, preferably four buckles 121, which provide stable and firm support for the assembly of the PVC sleeve 300 and the water stop steel pipe 100, and can reduce material waste relative to the connecting piece 120 surrounding one circle.

[0050] In specific applications, the number of buckles 121 is reasonably increased or decreased according to the cross-sectional dimension of the water stop steel pipe 100 perpendicular to the axial direction and the arc length dimension of the buckle 121, for example, in other embodiments, the buckle 121 is provided with three, five or six or other numbers.

[0051] The specific structure of the locking assembly of the embodiment will be described below.

[0052] As shown in Figure 4 In some embodiments, the locking assembly includes a matched first slot 321 and a first insertion part 311, the first insertion part 311 is arranged on the end face of the first semicircular part 310 towards the second semicircular part 320, and the first slot 321 is arranged on the end face of the second semicircular part 320 towards the first semicircular part 310. During the process of assembling the PVC sleeve 300 and the water stop steel pipe 100 into an integrated body for formwork support, only the bottom ends of the first semicircular part 310 and the second semicircular part 320 are overlapped with the connecting piece 120 along the radial direction of the PVC sleeve 300, and the first insertion part 311 is inserted into the corresponding first slot 321, so that the PVC sleeve 300 and the water stop steel pipe 100 can be assembled into an integrated body on the basis of locking the first semicircular part 310 and the second semicircular part 320 to form a whole. After the formwork is supported and the concrete pouring is completed, only the first semicircular part 310 and the second semicircular part 320 are moved away from each other along the radial direction of the PVC sleeve 300 so that the first insertion part 311 is pulled out of the first slot 321, so that the PVC sleeve 300 and the water stop steel pipe 100 can be separated on the basis of separating the first semicircular part 310 and the second semicircular part 320 from each other. The whole disassembly process has low technical difficulty, high construction efficiency and low labor intensity.

[0053] Specifically, the number of the first slots 321 is equal to the number of the first insertion parts 311, and the first insertion parts 311 are arranged in multiple, and the multiple first insertion parts 311 are arranged in the first semicircular part 310 along the axial direction of the PVC sleeve 300. The locking firmness of the first semicircular part 310 and the second semicircular part 320 is increased to avoid mutual separation under the impact of concrete during concrete pouring, and the stability and firmness of the formwork support are ensured. In specific applications, the number of the first slots 321 can also be set to be more than the number of the first insertion parts 311.

[0054] In specific applications, the number of the first insertion parts 311 is reasonably increased or decreased according to the size of the PVC sleeve 300 along the axial direction of the PVC sleeve 300, for example, in other embodiments, the first insertion parts 311 are arranged in two, three or four numbers.

[0055] Specifically, the first slot 321 is arranged in a tapered shape, and the size of the first slot 321 gradually decreases in the direction away from the first semicircular part 310. The first slot 321 is arranged in a tapered shape so that the first semicircular part 310 and the second semicircular part 320 are stably assembled into the PVC sleeve 300.

[0056] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope of the present application.

Claims

1. A water seepage prevention formwork structure for adhesive-free prestressed anti-floating anchor rods, characterized in that, The utility model relates to a waterproof steel pipe (100) for setting in the top end of anchor backing plate (210) and for setting on the top of anchor rod (220) outside, a PVC sleeve (300) can be detachably connected to the top end of the waterproof steel pipe (100) and is used for setting on the top of the anchor rod (220) outside, the PVC sleeve (300) includes split first half circle part (310) and second half circle part (320), the first half circle part (310) and the second half circle part (320) are radially symmetrical and are connected by locking assembly. The inner wall of the waterproof steel pipe (100) is provided with a waterproof ring (110), which is arranged at one end of the waterproof steel pipe (100) close to the PVC sleeve (300). The waterproof ring (110) extends from outside to inside along the radial direction of the waterproof steel pipe (100), and is gradually arranged downwardly inclined.

2. The water infiltration preventing formwork structure for the non-bonded prestressed anti-floatation anchor rod according to claim 1, characterized in that, The PVC sleeve (300) is coaxially arranged with the waterproof steel pipe (100); the top end of the waterproof steel pipe (100) is provided with a connecting piece (120), the PVC sleeve (300) is sleeved outside the connecting piece (120) and is in interference fit with the connecting piece (120).

3. The water infiltration preventing formwork structure for the non-bonded prestressed anti-floatation anchor rod according to claim 2, characterized in that, The outer diameter of the connecting piece (120) is smaller than the outer diameter of the waterproof steel pipe (100).

4. The water seepage prevention formwork structure for the non-bonded prestressed anti-float anchor rod according to any one of claims 1 to 3, characterized in that, The outer diameter of the waterproof steel pipe (100) is equal to the outer diameter of the PVC sleeve (300).

5. The water infiltration preventing formwork structure for the non-bonded prestressed anti-floatation anchor rod according to claim 4, characterized in that, The connecting piece (120) includes a plurality of buckles (121) arranged in a circumferential direction.

6. The water infiltration preventing formwork structure for the adhesiveless prestressed anti-floatation anchor rod according to claim 5, characterized in that, The locking assembly includes:

7. The water infiltration preventing formwork structure for the adhesiveless prestressed anti-floatation anchor rod according to claim 4, characterized in that, A first insertion part (311) is arranged on the end face of the first half circle part (310) towards the second half circle part (320); 8. The water infiltration preventing formwork structure for the adhesiveless prestressed anti-floatation anchor rod according to claim 1, characterized in that, A first insertion slot (321) is arranged on the end face of the second half circle part (320) towards the first half circle part (310), and the first insertion slot (321) is matched with the first insertion part (311). The number of the first insertion slot (321) is at least equal to the number of the first insertion part (311), the first insertion part (311) is provided with a plurality of first insertion parts (311) arranged in an axial direction. The first insertion slot (321) is tapered, and the size of the first insertion slot (321) gradually decreases in the direction away from the first half circle part (310).

9. The water infiltration preventing formwork structure for the adhesiveless prestressed anti floating anchor rod according to claim 8, characterized in that, ​ 10. The water infiltration preventing formwork structure for the non-bonded prestressed anti-floatation anchor rod according to claim 8 or 9, characterized in that, ​

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