CN212582757U - Anti-floating anchoring structure for basement bottom plate - Google Patents

Abstract

The utility model relates to a basement bottom plate anti-floating anchoring structure, in the construction process, a grouting body is arranged in a foundation; then the bearing pier is arranged above the grouting body; then, connecting the prestressed tendon between the first anchorage device and the second anchorage device, and tensioning the prestressed tendon to ensure that the prestressed tendon keeps a preset tension force; and finally, laying a bottom plate layer above the bearing pier, so that the connecting ribs are buried in the bottom plate layer, and thus completing the construction operation of the anti-floating anchoring structure of the basement bottom plate. Because the prestressed tendons have a certain tensile force in advance, the grouting body becomes a prestressed axle center tension member, and when the bottom plate layer is acted by the water buoyancy force, the buoyancy force on the bottom plate layer is transmitted to the bearing pier through the connecting tendons; and the bearing pier transmits the pressure to the grouting body, so that the grouting body is subjected to upward pulling force to balance part or all of the internal pressure, and the grouting body does not crack under the normal use condition.

Description

Anti-floating anchoring structure for basement bottom plate

Technical Field

The utility model relates to a building foundation technical field especially relates to anti anchor structure that floats of basement bottom plate.

Background

Basement with high underground water level and large buried depth usually adopts uplift anchor rods or uplift piles to balance water buoyancy so as to prevent the structure from floating upwards and losing stability. Traditionally, the anti-floating anchor is mainly a non-prestressed anchor rod bonded in full length, and the control of partial displacement is strict. The anti-floating anchor is designed according to technical rules of rock and soil anchor rods (cables), and is usually designed as a tension type anchor rod.

According to the technical standard for resisting floating in constructional engineering JGJ 476 and 2019, the anti-floating engineering needs to design buildings with the first and second grades, and the cracks of the anti-floating anchoring body need to be strictly controlled. In order to control the tensile stress not generated in the anchoring grouting body or the tensile stress not greater than the tensile strength of the axial center of the anchoring grouting body, the anti-floating anchoring necessarily adopts a prestressed anchor rod. Traditional anti floating anchor of prestressing force need increase structures such as pre-buried ground tackle and transition pipe at bottom plate structure, and the stock runs through whole bottom plate thickness, leads to the waterproofing degree of difficulty big. Meanwhile, the bottom plate is used as the anchoring end of the anchor rod, the stress state among the foundation, the anchor rod and the bottom plate is complex, and the bottom plate cracks easily occur to influence the waterproof effect.

SUMMERY OF THE UTILITY MODEL

Based on the above, there is a need to provide an anti-floating anchoring structure for the basement bottom plate, which simplifies the anchor rod structure, reduces the difficulty of waterproof construction, and improves the construction efficiency; meanwhile, the stress state on the bottom plate layer is effectively simplified, the occurrence probability of cracks on the bottom plate layer is reduced, and the waterproof effect is improved.

A basement floor anti-floating anchoring construction, the basement floor anti-floating anchoring construction comprising: the grouting body is used for being arranged in a foundation and provided with a first anchorage device; the bearing pier is positioned at the top of the grouting body, a second anchorage device opposite to the first anchorage device is arranged on the bearing pier, and a connecting rib is further arranged on the bearing pier; the two ends of the prestressed tendon penetrate into the grouting body and the force bearing pier respectively and are connected to the first anchorage device and the second anchorage device respectively, and the prestressed tendon keeps a preset tension force between the first anchorage device and the second anchorage device; and the bottom plate layer is laid on the bearing pier, and the connecting ribs are connected in the bottom plate layer.

In the anti-floating anchoring structure of the basement bottom plate, the grouting body is arranged in the foundation in the construction process; then the bearing pier is arranged above the grouting body; then, connecting the prestressed tendon between the first anchorage device and the second anchorage device, and tensioning the prestressed tendon to ensure that the prestressed tendon keeps a preset tension force; and finally, laying a bottom plate layer above the bearing pier, so that the connecting ribs are buried in the bottom plate layer, and thus completing the construction operation of the anti-floating anchoring structure of the basement bottom plate. Because the prestressed tendons have certain tension force in advance, the grouting body becomes a prestressed axis tension member, namely, internal pressure exists on the grouting body, and when the bottom plate layer is acted by the water buoyancy, the buoyancy on the bottom plate layer is transferred to the bearing pier through the connecting tendons; and the bearing pier transmits the force to the grouting body, so that the grouting body is subjected to upward pulling force to balance part or all of internal pressure, the grouting body does not crack under the normal use condition, and the stability and the durability of the anti-floating anchoring structure of the basement bottom plate are effectively improved. Simultaneously, this anti-floating anchor structure sets up the bearing mound in floor layer below to install the second ground tackle on the bearing mound, avoid traditional stock structure to need pass the floor structure and carry out the stretch-draw anchor, so, effectively simplified the stock structure, reduced the waterproof construction degree of difficulty, improve the efficiency of construction greatly. In addition, because the tensioning anchoring end does not need to penetrate through the whole bottom plate layer, the stress state on the bottom plate layer is effectively simplified, the crack occurrence probability of the bottom plate layer is reduced, and the waterproof effect of the bottom plate layer is improved.

In one embodiment, the anti-floating anchoring structure for the basement bottom plate further comprises a cushion layer, and the cushion layer is arranged between the force bearing pier and the bottom plate layer.

In one embodiment, an anchor sealing space is reserved between the second anchorage device and the cushion layer, and is used for injecting concrete or mortar to form a protective layer.

In one embodiment, the thickness h of the protective layer is greater than or equal to 50 mm.

In one embodiment, the anti-floating anchoring structure of the basement bottom plate further comprises a waterproof layer, and the waterproof layer is arranged between the cushion layer and the bottom plate layer.

In one embodiment, the pier comprises a steel bar net and a concrete block, the steel bar net is arranged on the concrete block, and the second anchorage device and the connecting bar are connected in the steel bar net.

In one embodiment, the connecting rib comprises a connecting part and a bent part, the bent part is connected to the connecting part and forms an included angle with the connecting part, the connecting part is connected to the force bearing pier, and the bent part is embedded in the bottom plate layer.

In one embodiment, the number of the connecting ribs is at least two, and at least two connecting ribs are arranged at intervals along the circumference of the pier.

In one embodiment, the prestressed tendon comprises a steel strand, a sleeve and a slow adhesive, the sleeve is sleeved outside the steel strand, and the slow adhesive is filled between the sleeve and the steel strand.

In one embodiment, the grout comprises a reinforcement cage and a support grout, the first anchor is installed in the reinforcement cage, and the support grout is injected into the reinforcement cage.

An anti-floating anchoring construction method comprises the following steps: drilling a pile hole on the foundation; installing a first anchorage device fixed with a prestressed tendon in a reinforcement cage, and installing the reinforcement cage into a pile hole; grouting or pouring concrete into the pile hole to form a grouting body in the pile hole; excavating a ground mold above the grouting body, and filling a reinforcing mesh into the ground mold; installing a second anchorage and a connecting rib in the steel bar net, and grouting or pouring concrete into the steel bar net to form a bearing pier; tensioning the prestressed tendon to enable the prestressed tendon to keep a preset tensioning force, and fixing the prestressed tendon on the second anchorage device; and performing anchor sealing operation on the second anchor, and paving a bottom plate layer above the bearing pier, so that the connecting ribs are embedded into the bottom plate layer.

In the anti-floating anchoring construction method, in the construction process, firstly, pile holes are drilled on the foundation; then the reinforcement cage provided with the first anchorage device is arranged in the pile hole; after the pile is filled, grouting or pouring concrete into the reinforcement cage to form grouting body in the pile hole; secondly, excavating a ground mould above the grouting body, and filling the reinforcing mesh into the ground mould; installing a second anchorage device and a connecting rib in the steel bar net, and grouting or pouring concrete to form a bearing pier; stretching the prestressed tendon to keep a preset stretching force and fixing; and finally, sealing the anchor and paving the bottom plate layer on the second anchorage device, so that the connecting ribs are buried in the bottom plate layer, and the construction operation of the anti-floating anchoring structure of the bottom plate of the basement is completed. Because the prestressed tendons have certain tension force in advance, the grouting body becomes a prestressed axis tension member, namely, internal pressure exists on the grouting body, and when the bottom plate layer is acted by the water buoyancy, the buoyancy on the bottom plate layer is transferred to the bearing pier through the connecting tendons; and the bearing pier transmits the force to the grouting body, so that the grouting body is subjected to upward pulling force to balance part or all of internal pressure, the grouting body does not crack under the normal use condition, and the stability and the durability of the anti-floating anchoring structure of the basement bottom plate are effectively improved. Simultaneously, this anti-floating anchor structure sets up the bearing mound in floor layer below to install the second ground tackle on the bearing mound, avoid traditional stock structure to need pass the floor structure and carry out the stretch-draw anchor, so, effectively simplified the stock structure, reduced the waterproof construction degree of difficulty, improve the efficiency of construction greatly. In addition, because the tensioning anchoring end does not need to penetrate through the whole bottom plate layer, the stress state on the bottom plate layer is effectively simplified, the crack occurrence probability of the bottom plate layer is reduced, and the waterproof effect of the bottom plate layer is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of an anti-floating anchoring configuration according to an embodiment;

fig. 2 is a top view of a pier structure according to an embodiment;

fig. 3 is an axial cross-sectional view of a tendon structure according to one embodiment;

fig. 4 is a schematic end view of a tendon according to an embodiment;

fig. 5 is a flow chart of an anti-floating anchoring construction method in one embodiment.

100. An anti-floating anchoring structure; 110. grouting; 111. a reinforcement cage; 112. supporting the slurry; 113. a first anchor; 120. bearing piers; 121. a reinforcing mesh; 122. a concrete block; 123. a second anchor; 124. Connecting ribs; 1241. a connecting portion; 1242. a bending part; 125. sealing an anchor space; 126. a protective layer; 130. A floor layer; 140. prestressed tendons; 141. a sleeve; 142. steel strand wires; 143. a slow binder; 150. a cushion layer; 160. a waterproof layer; 200. a foundation; 210. pile holes; 220. and (5) ground model.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In one embodiment, referring to fig. 1, an anti-floating anchoring structure 100 for a basement floor is disclosed, where the anti-floating anchoring structure 100 for a basement floor includes a grouting material 110, a pier 120, a tendon 140, and a floor layer 130. The grout 110 is for installation in the foundation 200, the grout 110 being provided with a first anchor 113. The bearing pier 120 is positioned at the top of the grouting body 110, a second anchorage device 123 opposite to the first anchorage device 113 is arranged on the bearing pier 120, and a connecting rib 124 is further arranged on the bearing pier 120. Two ends of the prestressed tendon 140 penetrate into the grouting body 110 and the force bearing pier 120 respectively and are connected to the first anchorage device 113 and the second anchorage device 123 respectively, and the prestressed tendon 140 keeps a preset tension force between the first anchorage device 113 and the second anchorage device 123. The bottom plate layer 130 is laid on the bearing pier 120, and the connecting ribs 124 are connected in the bottom plate layer 130.

In the basement bottom plate anti-floating anchoring structure 100, the grouting body 110 is installed in the foundation 200 in the construction process; then the bearing pier 120 is arranged above the grouting body 110; then, connecting the tendon 140 between the first anchor 113 and the second anchor 123, and tensioning the tendon 140, so that the tendon 140 maintains a preset tensioning force; finally, a bottom plate layer 130 is laid above the force bearing pier 120, so that the connecting ribs 124 are buried in the bottom plate layer 130, and the construction operation of the basement bottom plate anti-floating anchoring structure 100 is completed. Because the prestressed tendons 140 have a certain tensile force in advance, the grout 110 becomes a prestressed axial tension member, that is, there is an internal pressure on the grout 110, and when the floor layer 130 is acted by the water buoyancy, the buoyancy on the floor layer 130 is transmitted to the pier 120 through the connecting tendons 124; and then the force is transmitted to the grouting body 110 by the force bearing pier 120, so that the grouting body 110 is subjected to upward pulling force to balance part or all of the internal pressure, no crack is generated when the grouting body 110 is normally used, and the stability and durability of the basement bottom plate anti-floating anchoring structure 100 are effectively improved. Meanwhile, the anti-floating anchoring structure 100 is provided with the bearing pier 120 below the bottom plate layer 130, and the second anchor 123 is installed on the bearing pier 120, so that the situation that the traditional anchor rod structure needs to penetrate through the bottom plate structure for tensioning and anchoring is avoided, the anchor rod structure is effectively simplified, the difficulty of waterproof construction is reduced, and the construction efficiency is greatly improved. In addition, the stretching anchoring end does not need to penetrate through the whole bottom plate layer 130, so that the stress state on the bottom plate layer 130 is effectively simplified, the crack occurrence probability of the bottom plate layer 130 is reduced, and the waterproof effect of the bottom plate layer 130 is improved.

It should be noted that, in this embodiment, the types of the first anchorage device 113 and the second anchorage device 123 are not specifically limited, and it is only necessary to satisfy that the tendon 140 is connected between the first anchorage device 113 and the second anchorage device 123 and maintain the predetermined tension. Such as: the first anchor 113 and the second anchor 123 may be a circular anchor, a flat anchor, a bond anchor, or the like. Of course, in other embodiments, the selection of the first anchor 113 and the second anchor 123 may be selected according to the requirements of the JGJ 387, JGJ 85, GB/T14370 standards, and the like. In addition, the predetermined tension on the tendon 140 is determined according to the requirement of the crack resistance level of the actual floor layer 130.

Optionally, the connecting rib 124 is a hot-rolled steel bar, and the connecting rib 124 of this embodiment may be a non-prestressed steel bar, and the material of the connecting rib is an i-grade steel bar (HPB300 steel bar), i.e., a plain steel bar; the steel bar can also be set to be prestressed steel bars, and the material of the steel bar can adopt II-grade steel bars (HRB335 steel bars), III-grade steel bars (HRB400 steel bars) or IV-grade steel bars (HRB500 steel bars).

It should be further noted that, during the construction process, the connecting rib 124 extends out of the pier 120 by a certain length, so as to ensure that the connecting rib 124 has a sufficient length to be connected in the floor layer 130. Meanwhile, the present embodiment is limited to the anti-floating anchor structure 100, and does not limit the specific shape of the anchor structure. The anti-floating anchor configuration 100 may be applied to a rock bolt structure; and can also be applied to anchor pile structures.

Further, referring to fig. 1, the anti-floating anchoring structure 100 of the basement bottom plate further includes a cushion layer 150. The cushion layer 150 is arranged between the bearing pier 120 and the bottom plate layer 130, so that the cushion layer 150 is additionally arranged on the bearing pier 120, and the bottom plate layer 130 is convenient to construct and level. Meanwhile, the concrete separating the foundation 200 soil layer from the bottom plate layer 130 is convenient for construction, setting and positioning, and ensures the geometric dimension of the basement bottom plate.

Further, referring to fig. 1, an anchor sealing space 125 is formed between the second anchor 123 and the cushion layer 150. The anchor sealing space 125 is used for injecting concrete or mortar to form a protective layer 126, so that the anchor sealing operation above the second anchor 123 is ensured through the reserved space, and the protective effect on the second anchor 123 is realized. Wherein, the construction of the protection layer 126 and the cushion layer 150 can be performed simultaneously.

Specifically, referring to fig. 1, the anchor sealing operation uses micro-expanded fine aggregate concrete or non-shrinkage mortar, so as to prevent the anchor sealing material from shrinkage cracking and affecting the durability of the anchor. Meanwhile, in the anchoring operation, when the second anchoring device 123 is arranged in a concave manner, that is, there is enough anchoring space 125 above the second anchoring device 123, at this time, the elevation of the surface of the force bearing pier 120 should be flush with the bottom surface of the cushion layer 150; when the second anchorage device 123 is arranged in an outward convex manner, namely the second anchorage device 123 protrudes out of the surface of the bearing pier 120, at the moment, the elevation of the bearing pier 120 needs to be reduced to be lower than the bottom surface of the cushion layer 150, so as to meet the requirement of anchor sealing thickness.

In one embodiment, referring to fig. 1, the thickness h of the protection layer 126 is greater than or equal to 50mm, so as to ensure that the thickness h of the protection layer 126 is not less than 50mm, and has a sufficient thickness to protect the second anchor 123, so that the second anchor 123 has a more stable structure.

In one embodiment, referring to fig. 1, the basement floor anti-floating anchoring structure 100 further includes a waterproof layer 160. The waterproof layer 160 is disposed between the cushion layer 150 and the floor layer 130. Therefore, in the construction process, after tensioning and anchoring, the second anchorage device 123 is sealed and anchored to form a protective layer 126; and then, a cushion layer 150, a waterproof layer 160 and a bottom plate layer 130 are sequentially laid above the bearing pier 120 to ensure that the basement bottom plate has a better waterproof effect.

In one embodiment, referring to fig. 1, the pier 120 includes a steel mesh 121 and a concrete block 122. The mesh reinforcement 121 is laid on the concrete block 122. The second anchors 123 and the tie bars 124 are connected to the inside of the mesh reinforcement 121. Therefore, in the construction process of the force bearing pier 120, the ground form 220 is excavated above the grouting body 110; then, the woven reinforcing mesh 121 is arranged in the ground model 220; then, one end of the tendon 140 is inserted into the second anchorage device 123, and the connecting tendon 124 is connected to the mesh reinforcement 121; and finally, grouting or pouring concrete into the reinforcing mesh 121 to complete the construction operation of the force bearing pier 120. The size of the ground form 220 should be larger than that of one end of the grouting material 110, and the specific size of the ground form needs to meet the requirements of local compression resistance and arrangement of the second anchorage device 123.

It should be noted that the mesh reinforcement 121 is made of high-quality low-carbon steel wires, cold-rolled ribbed steel wires for stainless steel wires, or cold-rolled round steel wires, which are arranged at right angles in the longitudinal and transverse directions and crossed at a certain interval, and is formed by electric welding.

In one embodiment, referring to fig. 1, the connecting rib 124 includes a connecting portion 1241 and a bending portion 1242. The bending portion 1242 is connected to the connecting portion 1241 and forms an included angle with the connecting portion 1241. The connecting part 1241 is connected to the pier 120. The bent portion 1242 is embedded in the floor layer 130. Therefore, one end of the connecting rib 124 is bent, so that the connecting rib 124 is prevented from being excessively reserved and penetrating through the floor layer 130 in the construction process of the floor layer 130. Simultaneously, bend the setting with splice bar 124 one end, increase the transverse connection in splice bar 124 and the bottom plate layer 130, improve the combination dynamics between splice bar 124 and the bottom plate layer 130, promote the overall structure stability of basement bottom plate.

Specifically, referring to fig. 1, the bending portion 1242 and the connecting portion 1241 are disposed at an included angle of 90 °.

In one embodiment, referring to fig. 2, the number of the connecting ribs 124 is at least two. At least two splice bars 124 set up along the circumference interval of bearing pier 120, so, further improve cohesion between splice bar 124 and the floor layer 130, guarantee that basement floor structure is more stable.

In one embodiment, referring to fig. 3 and 4, the tendon 140 includes a steel strand 142, a sleeve 141, and a slow adhesive 143. The sleeve 141 is sleeved outside the steel strand 142. The slow adhesive 143 is filled between the sleeve 141 and the steel strand 142. Therefore, the prestressed tendon 140 of the embodiment is a slowly-bonded prestressed steel strand, is sleeved outside the steel strand 142 through the sleeve 141, and is bonded through the slow bonding agent 143, so that the sealing property between the prestressed tendon 140 and the steel strand is improved, the corrosion resistance of the prestressed tendon 140 is greatly improved, and the anti-floating anchoring structure 100 can be effectively applied to environments with high water and soil corrosivity. Meanwhile, in the embodiment, a slow bonding prestress technology is adopted in the anti-floating anchoring structure 100, in the construction process, the early-stage slow bonding agent 143 is not solidified, and the tension resistance of the steel strands 142 is small; after a certain time, the bonding agent 143 is slowly solidified, the steel strand 142 and the sleeve 141 are tightly bonded, a bonding prestress system is formed, and the anti-cracking and anti-corrosion performance is good. In addition, the prestressed steel strand is slowly bonded in the embodiment, the free section of the traditional prestressed anchor rod is saved, the anchor rod structure is simplified, protective grease or bonding slurry does not need to be poured after tensioning, the working procedure is simplified, and the working efficiency is improved.

It should be noted that, in the process of connecting the tendon 140 with the first anchor 113 or the second anchor 123, the steel strand 142 needs to remove the plastic protective sleeve 141 of the anchoring portion; and after removing the slow-bonding adhesive attached to the steel strand 142, firmly connecting the steel strand 142 with the first anchorage 113 or the second anchorage 123. The slow binder 143 may be prepared according to the construction progress requirement, and may generally have a standard tension pot life of 60 days and a standard curing time of 180 days. Such as: the slow adhesive 143 may be a silicone adhesive, an epoxy adhesive, an acrylic adhesive, or the like. Meanwhile, the sleeve 141 may be a plastic pipe having a dimple on the outside.

In one embodiment, referring to fig. 1, the grout 110 includes a reinforcement cage 111 and a support grout 112. The first anchorage 113 is installed at the bottom of the reinforcement cage 111 and connected with the end of the tendon 140. Support slurry 112 is injected into the reinforcement cage 111. Therefore, in the construction process of the grout 110, firstly, the pile hole 210 is drilled on the foundation 200; then installing the reinforcement cage 111 fixed with the first anchorage 113 in the pile hole 210; after installation, the pile hole 210 is grouted or poured with concrete to form the grout 110.

It should be noted that the cross-sectional dimension of the grout 110, the selection of the bearing layer, the bonding strength between the grout 110 and the rock-soil layer, and the resistance value of the uplift side all need to be determined according to the prior art specifications and indexes. Meanwhile, in order to ensure the compactness of the grout 110, a secondary grouting process may be adopted in the grouting process.

It should be noted that the reinforcement cage 111 mainly plays a role in tensile strength, and the compressive strength of the concrete is high but the tensile strength is very low, so that the reinforcement cage 111 plays a role in restraining the pile body concrete so that the pile body concrete can bear a certain axial tensile force. Meanwhile, part of the longitudinally arranged hot rolled steel bars in the steel bar cage 111 can be replaced by slow-bonding prestressed steel strands. In addition, the second anchorage 123 may be welded or bonded to the reinforcement cage 111.

In one embodiment, referring to fig. 1 and 5, a method for anti-floating anchoring construction includes the following steps:

s10, drilling pile holes 210 on the foundation 200;

s20, installing a first anchorage 113 fixed with a prestressed tendon 140 in the reinforcement cage 111, and installing the reinforcement cage 111 into the pile hole 210;

s30, grouting or pouring concrete into the pile hole 210 to form a grouting body 110 in the pile hole 210;

s40, excavating a ground form 220 above the grouting body 110, and filling the reinforcing mesh 121 into the ground form 220;

s50, installing second anchors 123 and connecting bars 124 in the reinforcing mesh 121, and grouting or pouring concrete into the reinforcing mesh 121 to form the pier 120;

s60, tensioning the prestressed tendon 140 to enable the prestressed tendon 140 to keep a preset tension force, and fixing the prestressed tendon 140 on the second anchorage device 123;

and S70, performing anchor sealing operation on the second anchor 123, and paving the bottom plate layer 130 above the force bearing pier 120, so that the connecting ribs 124 are embedded in the bottom plate layer 130.

In the anti-floating anchoring construction method, in the construction process, firstly, pile holes 210 are drilled on the foundation 200; then the reinforcement cage 111 provided with the first anchorage device 113 is arranged in the pile hole 210; after the pile is installed, grouting or pouring concrete into the reinforcement cage 111 to form a grouting body 110 in the pile hole 210; then, excavating a ground form 220 above the grouting body 110, and filling the reinforcing mesh 121 into the ground form 220; installing a second anchorage device 123 and a connecting bar 124 in the reinforcing mesh 121, and grouting or pouring concrete to form a force bearing pier 120; tensioning the prestressed tendons 140 to keep a preset tension force and fixing; finally, the second anchorage device 123 is sealed and the bottom slab layer 130 is laid, so that the connecting rib 124 is buried in the bottom slab layer 130, and the construction operation of the basement bottom slab anti-floating anchoring structure 100 is completed. Because the prestressed tendons 140 have a certain tensile force in advance, the grout 110 becomes a prestressed axial tension member, that is, there is an internal pressure on the grout 110, and when the floor layer 130 is acted by the water buoyancy, the buoyancy on the floor layer 130 is transmitted to the pier 120 through the connecting tendons 124; and then the force is transmitted to the grouting body 110 by the force bearing pier 120, so that the grouting body 110 is subjected to upward pulling force to balance part or all of the internal pressure, the bottom plate layer 130 does not crack under the normal use condition, and the stability and durability of the basement bottom plate anti-floating anchoring structure 100 are effectively improved. Simultaneously, this anti-floating anchor structure 100 sets up bearing pier 120 in floor layer 130 below to install second ground tackle 123 on bearing pier 120, avoid traditional stock structure to need pass the floor structure and carry out the stretch-draw anchor, so, effectively simplified the stock structure, reduced the waterproof construction degree of difficulty, improve the efficiency of construction greatly. In addition, the stretching anchoring end does not need to penetrate through the whole bottom plate layer 130, so that the stress state on the bottom plate layer 130 is effectively simplified, the crack occurrence probability of the bottom plate layer 130 is reduced, and the waterproof effect of the bottom plate layer 130 is improved.

In consideration of the pre-stress of the grouting body 110 and the force bearing pier 120, the mortar or concrete with higher strength is adopted during the grouting or pouring process, the mortar strength can be more than M40, and the concrete strength is not lower than C40. Furthermore, the sealing operation is understood to be: grouting or pouring concrete over the second anchorage 123 such that a protective layer 126 is formed over the second anchorage 123.

Further, the step of S70, performing an anchor sealing operation on the second anchor 123 further includes:

when the second anchorage device 123 is anchored, the cushion layer 150 and the waterproof layer 160 are also constructed between the bearing pier 120 and the bottom plate layer 130. Wherein the anchor sealing operation and the construction of the cushion 150 can be performed simultaneously.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of 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, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims (10)

1. The utility model provides a basement bottom plate anti-floating anchor structure which characterized in that, basement bottom plate anti-floating anchor structure includes:

the grouting body is used for being arranged in a foundation and provided with a first anchorage device;

the bearing pier is positioned at the top of the grouting body, a second anchorage device opposite to the first anchorage device is arranged on the bearing pier, and a connecting rib is further arranged on the bearing pier;

the two ends of the prestressed tendon penetrate into the grouting body and the force bearing pier respectively and are connected to the first anchorage device and the second anchorage device respectively, and the prestressed tendon keeps a preset tension force between the first anchorage device and the second anchorage device; and

the bottom plate layer is laid on the bearing piers, and the connecting ribs are connected in the bottom plate layer.

2. The basement floor anti-floating anchor structure of claim 1, further comprising a cushion layer disposed between the pier and the floor layer.

3. The anti-floating anchoring structure of the basement bottom plate according to claim 2, wherein an anchor sealing space is reserved between the second anchorage device and the cushion layer, and the anchor sealing space is used for injecting concrete or mortar to form a protective layer.

4. The anti-floating anchoring structure of basement floor according to claim 3, wherein thickness h of said protective layer is greater than or equal to 50 mm.

5. The basement floor anti-floating anchor structure of claim 3, further comprising a waterproof layer disposed between the cushion layer and the floor layer.

6. The anti-floating anchoring structure of the basement bottom plate according to claim 1, wherein the force bearing pier comprises a steel bar mesh and a concrete block, the steel bar mesh is arranged on the concrete block, and the second anchorage device and the connecting rib are connected in the steel bar mesh.

7. The anti-floating anchoring structure of the basement bottom plate according to claim 1, wherein the connecting rib comprises a connecting portion and a bent portion, the bent portion is connected to the connecting portion and arranged at an included angle with the connecting portion, the connecting portion is connected to the force bearing pier, and the bent portion is embedded in the bottom plate layer.

8. The anti-floating anchoring structure of the basement bottom plate according to any one of claims 1-7, wherein the number of the connecting ribs is at least two, and at least two connecting ribs are arranged at intervals along the circumference of the force bearing pier.

9. The anti-floating anchoring structure of the basement bottom plate according to any one of claims 1 to 7, wherein the prestressed ribs comprise steel strands, sleeves and slow adhesive, the sleeves are sleeved outside the steel strands, and the slow adhesive is filled between the sleeves and the steel strands.

10. The anti-floating anchoring structure of the basement bottom plate according to any one of claims 1 to 7, wherein the grouting body comprises a reinforcement cage and a support grout, the first anchor is installed in the reinforcement cage, and the support grout is injected into the reinforcement cage.

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