CN117779757A - Anti-floating anchor rod structure and construction method - Google Patents

Abstract

The invention discloses an anti-floating anchor rod structure and a construction method, wherein the anti-floating anchor rod structure comprises an anchor rod main body and a water-proof bag body, the lower end of the anchor rod main body is used for being installed in a drilling hole of a foundation, and the upper end of the anchor rod main body extends out of the drilling hole and is used for being connected with a foundation raft; the anchor rod main body comprises three anchor rod reinforcing steel bars uniformly distributed along the circumferential direction, wherein the three anchor rod reinforcing steel bars enclose a mounting hole, and a grouting pipe is arranged in the mounting hole; the outer side wall of the part of the anchor rod main body positioned in the drilling hole is provided with a first connecting plate; the upper end of the waterproof bag body along the height direction is provided with an opening, the upper end face is connected to the first connecting plate, the lower end of the anchor rod body is arranged in the waterproof bag body, the inner bottom wall of the waterproof bag body along the height direction is connected with the lower end face of the anchor rod body through an elastic piece, and the outer surface of the waterproof bag body is used for being abutted to and attached to the inner wall of a drilled hole. The invention can effectively isolate groundwater from penetrating upwards along the root gap of the anchor rod main body through the anchor rod reinforcing steel bar, thereby effectively avoiding the phenomenon of water seepage of the foundation raft.

Description

Anti-floating anchor rod structure and construction method

Technical Field

The invention relates to the technical field of building anchoring construction, in particular to an anti-floating anchor rod structure and a construction method.

Background

Along with severe weather conditions and changeable weather conditions in recent years, short-time excessive rainfall is easy to occur, ponding is easy to be caused at a position with higher groundwater level or lower topography, in order to avoid damage to a building structure caused by floating up of the building structure due to buoyancy action of groundwater, an anti-floating anchor rod is generally used for anchoring connection with raft steel bars, the floating force is resisted by friction force between anchor body steel bars of the anti-floating anchor rod and soil layers around grouting bodies, the existing anti-floating anchor rod is always waterproof through a structure formed by solidification of the anchor body steel bars of the anti-floating anchor rod and grouting concrete, when grouting, if the condition of incompact vibration occurs, the root of the anti-floating anchor rod is very easy to produce quality problems such as drilling gaps, groundwater can penetrate upwards through the anchor body steel bars along root gaps of the anti-floating anchor rod, and finally water seepage phenomenon occurs to a raft; at present, in order to improve the water stopping performance of the anti-floating anchor rod, most of the existing anti-floating anchor rod structures are waterproof by welding a water stopping steel plate at the bottom of the anti-floating anchor rod, but the root of the anti-floating anchor rod of the existing anti-floating anchor rod structure cannot completely isolate water, so that the water stopping steel plate at the bottom and the reinforcing steel bars of the anchoring body are corroded easily, the water stopping effect is poor, and water seepage phenomenon easily occurs.

Disclosure of Invention

Therefore, the invention aims to overcome the defects that the root of an anti-floating anchor rod structure in the prior art cannot completely isolate water, a water stop steel plate and an anchor body steel bar at the bottom are easily corroded, the water stop effect is poor and water seepage phenomenon is easily caused, and further provides the anti-floating anchor rod structure and a construction method.

According to a first aspect of the present invention there is provided an anti-floating anchor structure comprising:

the anchor rod main body is used for being installed in a drilling hole of a foundation, and the upper end of the anchor rod main body in the height direction extends out of the drilling hole and is used for being connected with a foundation raft; the anchor rod main body comprises three anchor rod reinforcing steel bars uniformly distributed along the circumferential direction, wherein the three anchor rod reinforcing steel bars enclose a mounting hole, and the mounting hole is arranged in parallel to the height direction;

the grouting pipe is arranged in the mounting hole;

the first connecting plate is arranged at the lower end of the outer side wall of the anchor rod main body and is used for being installed in a drill hole;

the waterproof bag body is provided with the opening along the upper end of direction of height, and along the up end of direction of height connect in on the first connecting plate, the lower extreme setting of stock main part is in the waterproof bag body, the waterproof bag body along the interior bottom wall of direction of height with the lower terminal surface of stock main part is connected through the elastic component, the surface of waterproof bag body is used for the butt laminating in the inner wall of drilling.

The anti-floating anchor rod structure provided by the invention has at least the following technical effects:

1. the lower end part of the anchor rod main body extends into the waterproof bag body, and an elastic piece is connected between the inner bottom wall of the waterproof bag body and the lower end surface of the anchor rod main body; when the waterproof bag body is placed into the drill hole along with the anchor rod main body to perform grouting construction, because the grouting end of the grouting pipe stretches into the waterproof bag body, cement slurry flowing out of the grouting pipe in a high-pressure grouting mode firstly flows into the waterproof bag body, and the impact force of the cement slurry flowing out of the grouting pipe in a high-pressure grouting mode is reduced by utilizing the performance of elastic deformation absorption energy of the elastic piece, so that the impact on the inner bottom wall of the waterproof bag body and the inner bottom wall of the drill hole in the grouting construction process is reduced, the generation of scum is reduced, and the grouting amount of cement slurry is saved; the cement slurry is smoothly filled into the water-proof capsule body, the water-proof capsule body is gradually spread until the outer surface of the water-proof capsule body is abutted against and attached to the inner side wall and the inner bottom wall of the drill hole, and the root of the lower end of the anchor rod main body is basically completely water-proof, so that the anti-floating anchor rod structure effectively blocks the corrosion of underground water to anchor rod steel bars from the source, and the service life is prolonged; and the effective ground water that insulates upwards permeates through the stock reinforcing bar along the root space of stock main part to the effectual phenomenon that avoids appearing the foundation raft infiltration has improved waterproof quality, has reduced the repair construction cost of later stage because of the foundation raft infiltration.

2. Through constituteing the stock main part with three stock reinforcing bar along circumference equipartition, constitute the stock main part for adopting single stock reinforcing bar, the external diameter of the cross-section of stock main part perpendicular to direction of height of this anti-floating anchor structure is bigger for this anti-floating anchor structure's vertical load bearing performance is better, has improved this anti-floating anchor structure's overall structure life.

Preferably, the lower end face of the anchor rod main body is provided with a sleeve, the sleeve is arranged along the height direction, the elastic piece is provided as a spring, the spring is sleeved in the sleeve, and the lower end along the height direction extends out of the sleeve and is connected with the inner bottom wall of the water-proof bag body.

Preferably, the anchor further comprises a plurality of folding support assemblies, and a plurality of folding support assemblies are arranged at intervals along the circumference of the anchor rod main body; each folding support assembly comprises a first support rod, wherein the upper end of the first support rod in the height direction is hinged to the first connecting plate, and the lower end of the first support rod in the height direction is hinged to the middle of the inner wall of the waterproof bag body.

Preferably, a second connecting plate is arranged at the opening of the water-proof bag body and is detachably connected to the lower end face of the first connecting plate along the height direction; the upper end of the first supporting rod in the height direction is hinged to the second connecting plate;

and/or a third connecting plate is arranged on the inner bottom wall of the waterproof bag body, the third connecting plate is positioned right below the first connecting plate along the height direction, and the lower end of the elastic piece is connected to the third connecting plate; each folding support assembly further comprises a second support rod, the lower end of the second support rod is hinged to the third connecting plate, and the upper end of the second support rod and the lower end of the first support rod are hinged to the same position in the middle of the inner wall of the waterproof bag body.

Preferably, a plurality of first through holes are uniformly distributed on the first connecting plate along the circumferential direction, and each first through hole penetrates through the first connecting plate along the height direction; the second through holes are formed in the second connecting plate in a penetrating manner along the height direction at positions corresponding to the first through holes; when in connection, the first fastening bolt sequentially passes through the first through hole and the second through hole and is screwed with a first fastening nut.

Preferably, a connecting part is arranged at the lower end of the elastic piece along the height direction, an internal threaded hole is arranged in the lower end of the connecting part, and a third through hole is formed in the third connecting plate in a penetrating manner along the height direction at a position corresponding to the internal threaded hole; when in connection, the second fastening bolt passes through the third through hole and is screwed into the internal threaded hole.

Preferably, the foundation raft comprises a foundation, a foundation raft body, a foundation, a waterproof layer and a foundation, wherein the foundation is paved on the upper end face of the foundation, the waterproof layer is arranged on the upper end face of the foundation, and the upper end face of the waterproof layer is used for being abutted to the lower end face of the foundation raft; the positions of the cushion layer and the waterproof layer, which correspond to the anchor rod main body, are all penetrated in the height direction to form perforations, and the perforations are used for the anchor rod main body to penetrate through.

Preferably, each anchor rod reinforcing steel bar is sleeved with an inverted water stop ring, and the upper end face of the inverted water stop ring is abutted against the lower end face of the waterproof layer; the water-stopping steel plate is sleeved on the anchor rod main body, is positioned right above the inverted water-stopping ring along the height direction and is abutted to the upper end face of the waterproof layer;

and/or, the upper end of each anchor rod reinforcing steel bar is sleeved with a water stop ring, and the lower end face of the water stop ring is abutted to the upper end face of the waterproof layer.

Preferably, a plurality of positioners are arranged at intervals along the height direction at the part of the anchor rod main body positioned in the drilling hole, and the outer side wall of each positioner is used for abutting against the inner wall of the drilling hole; therefore, a connecting hole is formed in the positioner in a penetrating mode along the height direction, the inner diameter of the connecting hole is larger than the outer diameter of the anchor rod main body, three connecting supports are uniformly distributed on the positioner along the circumferential direction, and one ends, facing the center of the anchor rod main body, of the three connecting supports are fixedly connected to the three anchor rod reinforcing steel bars respectively.

According to a second aspect of the present invention, there is provided a construction method for constructing the anti-floating anchor structure provided in the first aspect in a foundation, the construction method comprising the steps of:

measuring the area to be anti-floating of the building, determining the position where the anchor rod is required to be anti-floating reinforced, and marking the position where the anchor rod is arranged on the foundation;

drilling a drilling hole with a required depth at the position marked with the anchor rod on the foundation;

selecting three anchor bar steel bars with required length, uniformly distributing and connecting the three anchor bar steel bars into a whole along the circumferential direction to form an anchor bar main body, and enclosing the three anchor bar steel bars into a mounting hole;

a first connecting plate is arranged at a set position of the lower end of the outer side wall of the anchor rod main body;

connecting the upper end of the waterproof bag body to a first connecting plate, extending the lower end part of the anchor rod main body into the waterproof bag body, and installing an elastic piece between the lower end surface of the anchor rod main body and the inner bottom wall of the waterproof bag body along the height direction;

placing the water-proof bag body into the drill hole together with the anchor rod main body until the anchor rod main body is sunk in place;

placing the grouting pipe into the mounting hole until the grouting pipe descends and stretches into the waterproof bag body, connecting the upper end of the grouting pipe with a grouting machine, injecting cement slurry through the grouting pipe, enabling the cement slurry to flow into the waterproof bag body at first, and gradually expanding the waterproof bag body along with filling of the cement slurry until the outer surface of the waterproof bag body is abutted against the inner side wall and the inner bottom wall of the drill hole;

and then injecting cement paste through a grouting pipe, wherein the cement paste flows into the drilled hole from the opening of the waterproof bag body until the drilled hole is filled, and preparing the anti-floating anchor rod structure after the cement paste is solidified.

According to the construction method, at least the following technical effects are achieved:

1. the lower end part of the anchor rod main body extends into the waterproof bag body, and an elastic piece is connected between the inner bottom wall of the waterproof bag body and the lower end surface of the anchor rod main body; when the grouting construction is carried out after the waterproof bag body is placed in the drilling hole along with the anchor rod main body to settle in place, because the grouting end of the grouting pipe stretches into the waterproof bag body, the cement slurry flowing out of the grouting pipe in a high-pressure grouting mode firstly flows into the waterproof bag body, and the impact force of the cement slurry flowing out of the grouting pipe in a high-pressure grouting mode is reduced by utilizing the performance of absorbing energy through the elastic deformation of the elastic piece, so that the impact on the inner bottom wall of the waterproof bag body and the inner bottom wall of the drilling hole in the grouting construction process is reduced, the generation of scum is reduced, and the grouting amount of cement slurry is saved; the cement slurry is smoothly filled into the water-proof capsule body, the water-proof capsule body is gradually spread until the outer surface of the water-proof capsule body is abutted against the inner side wall and the inner bottom wall of the drill hole, and the root of the lower end of the anchor rod main body is basically completely water-proof, so that the anti-floating anchor rod structure prepared by the construction method effectively blocks the corrosion of underground water to anchor rod steel bars from the source, and the service life of the anti-floating anchor rod structure is prolonged; and the effective ground water that insulates upwards permeates through the stock reinforcing bar along the root space of stock main part to the effectual phenomenon that avoids appearing the foundation raft infiltration has improved waterproof quality, has reduced the repair construction cost of later stage because of the foundation raft infiltration.

2. According to the construction method, three anchor rod reinforcing steel bars uniformly distributed along the circumferential direction form the anchor rod main body, and compared with the anchor rod main body formed by single anchor rod reinforcing steel bars, the outer diameter of the section of the anchor rod main body of the anti-floating anchor rod structure manufactured by the construction method, which is perpendicular to the height direction, is larger, so that the vertical load bearing performance of the anti-floating anchor rod structure manufactured by the construction method is better, and the overall structural life of the anti-floating anchor rod structure manufactured by the construction method is prolonged.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a front view structure of an anti-floating anchor structure according to the present embodiment, wherein the structure is connected between a foundation and a foundation raft and cement paste in a borehole is removed;

FIG. 2 is an enlarged schematic view of FIG. 1 at A;

FIG. 3 is a schematic view of a portion of an anti-floating anchor structure according to the present embodiment;

FIG. 4 is an enlarged schematic view at B in FIG. 3;

FIG. 5 is an enlarged schematic view of FIG. 3 at C;

fig. 6 is a schematic top view of the assembly of the anchor body and the positioner in the anti-floating anchor structure according to the present embodiment;

fig. 7 is a schematic cross-sectional front view of the anchor body and retainer assembly in an anti-floating anchor structure according to this embodiment.

Reference numerals illustrate:

1-an anchor rod main body, 11-anchor rod reinforcing steel bars, 111-an inverted water stop ring, 112-a water stop steel plate, 113-a water stop ring, 114-a positioning piece, 12-a first connecting plate, 13-an elastic piece and 14-a sleeve;

2-foundation;

3-foundation rafts;

4-grouting pipe;

5-waterproof bag bodies, 51-second connecting plates and 52-third connecting plates;

61-a first support bar and 62-a second support bar;

71-first fastening bolts, 72-first fastening nuts;

81-cushion layer, 82-waterproof layer;

9-positioners, 91-connecting holes, 92-connecting brackets and 93-mounting plates.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Example 1

As shown in fig. 1 to 5, the anti-floating anchor structure provided in this embodiment includes an anchor body 1 and a water-proof bladder 5, wherein the anchor body 1 is configured to be installed in a borehole of a foundation 2, and an upper end in a height direction extends out of the borehole and is configured to be connected to a foundation raft 3; the anchor rod main body 1 comprises three anchor rod reinforcing steel bars 11 uniformly distributed along the circumferential direction, wherein the three anchor rod reinforcing steel bars 11 enclose a mounting hole, the mounting hole is arranged parallel to the height direction, and a grouting pipe 4 is arranged in the mounting hole; the lower end of the outer side wall of the anchor rod main body 1 is provided with a first connecting plate 12, the first connecting plate 12 is used for being installed in a drilling hole, and the first connecting plate 12 is perpendicular to the height direction; the upper end of the waterproof bag body 5 along the height direction is provided with an opening, the upper end face of the waterproof bag body 5 along the height direction is connected to the first connecting plate 12, the lower end of the anchor rod body 1 is arranged in the waterproof bag body 5, the inner bottom wall of the waterproof bag body 5 along the height direction is connected with the lower end face of the anchor rod body 1 through an elastic piece 13, cement paste is filled in the waterproof bag body 5, and the outer surface of the waterproof bag body 5 is used for being abutted to the inner wall of a drilled hole. It is understood that the height direction of the present embodiment refers to the height direction in fig. 1.

The anti-floating anchor structure of the embodiment is characterized in that the lower end part of the anchor body 1 is extended into the waterproof bag body 5 (namely, the grouting end of the grouting pipe 4 is extended into the waterproof bag body 5), and an elastic piece 13 is connected between the inner bottom wall of the waterproof bag body 5 and the lower end face of the anchor body 1; when the waterproof bag body 5 is placed into a drill hole along with the anchor rod main body 1 for grouting construction, because the grouting end of the grouting pipe 4 stretches into the waterproof bag body 5, the cement slurry flowing out in a high-pressure grouting mode through the grouting pipe 4 flows into the waterproof bag body 5 at first, and the impact force of the cement slurry flowing out in a high-pressure grouting mode is reduced by utilizing the performance of elastic deformation absorption energy of the elastic piece 13, so that the impact on the inner bottom wall of the waterproof bag body 5 and the inner bottom wall of the drill hole in the grouting construction process is reduced, the generation of scum is reduced, and the grouting amount of cement slurry is saved; the cement slurry is smoothly filled into the water-proof capsule body 5, the water-proof capsule body 5 is gradually spread until the outer surface of the water-proof capsule body 5 is abutted against the inner side wall and the inner bottom wall of the drill hole, the root of the lower end of the anchor rod main body 1 is basically completely water-proof, and therefore the anti-floating anchor rod structure of the embodiment effectively blocks the corrosion of underground water to the anchor rod steel bars 11 from the source and prolongs the service life; and the effective ground water that insulates upwards permeates through stock reinforcing bar 11 along the root space of stock main part 1 to the effectual phenomenon of 3 oozes of basic raft that avoids appearing has improved waterproof quality, has reduced the repair construction cost of later stage because of 3 oozes of basic raft. Still constitute stock main part 1 through three stock reinforcing bars 11 with following circumference equipartition, constitute stock main part 1 for adopting single stock reinforcing bar 11, the external diameter of the stock main part 1 perpendicular to the cross-section of direction of height of anti-floating anchor structure of this embodiment is bigger for the vertical load bearing performance of anti-floating anchor structure of this embodiment is better, has improved the overall structure life-span of anti-floating anchor structure of this embodiment.

It should be noted that, because the elastic element 13 is connected between the inner bottom wall of the waterproof bag body 5 and the lower end face of the anchor rod main body 1, when the cement slurry flowing out from the grouting pipe 4 in a high-pressure grouting mode initially flows into the waterproof bag body 5, the elastic element 13 can reduce the impact force of the cement slurry flowing out from the grouting pipe in a high-pressure grouting mode, so that the anchor rod main body 1 is inclined due to the impact generated in the grouting construction process, the perpendicularity of the anchor rod main body 1 is ensured, the eccentric tensile stress generated by the anchor rod main body 1 is effectively prevented, and the damage to the foundation raft 3 is effectively avoided. Simultaneously, cement slurry is injected into the waterproof bag body 5 at first, and after the waterproof bag body 5 is spread until the outer surface of the waterproof bag body 5 is abutted against the inner side wall and the inner bottom wall of the drill hole, cement slurry is injected into the drill hole part above the waterproof bag body 5, and at the moment, the completely spread waterproof bag body 5 plays a role in positioning, so that the anchor rod main body 1 can be ensured not to incline.

It will be appreciated that the grouting pipe 4 is movably inserted into the mounting hole so that the grouting pipe 4 is pulled out after grouting is completed.

As shown in fig. 1, specifically, the upper end of each anchor bar reinforcement 11 is turned outwards towards one side facing away from the center of the anchor bar body 1 to form a positioning piece 114, and the three positioning pieces 114 are abutted against the foundation raft 3 from different angles so as to keep the anchor bar body 1 stable, and can be used as a temporary steel-laying stirrup of the reinforcement of the foundation raft 3, so that the construction process is simplified, and the construction difficulty is reduced.

As shown in fig. 3 and 5, in some embodiments of the present invention, a sleeve 14 is provided at a lower end surface of the anchor body 1, the sleeve 14 is disposed in a height direction, the elastic member 13 is provided as a spring, the spring is sleeved in the sleeve 14, and a lower end in the height direction extends out of the sleeve 14 and is connected to an inner bottom wall of the waterproof capsule 5. The sleeve 14 can protect the spring, isolate cement paste from blocking caused by direct contact with the upper end part of the spring, and avoid the abnormal elastic deformation of the spring to absorb energy. In a specific application, the elastic member 13 may also be provided as an elastic rubber member.

As shown in fig. 1, 3 and 4, in some embodiments of the invention, the anti-floating anchor structure further comprises a plurality of folding support assemblies, preferably four here, which are circumferentially spaced around the anchor body 1; each folding support assembly comprises a first support rod 61, the upper end of the first support rod 61 in the height direction is hinged to the first connecting plate 12, the lower end of the first support rod 61 in the height direction is hinged to the middle of the inner wall of the waterproof bag body 5, and in the process of flowing cement slurry into the waterproof bag body 5 and gradually expanding the waterproof bag body 5, the first support rod 61 can be driven to be gradually expanded to provide expansion support force for the waterproof bag body 5, the waterproof bag body 5 is ensured to be fully expanded, fine holes caused by uncompacted vibration of the cement slurry flowing into the waterproof bag body 5 can be avoided, and a water stopping effect is achieved; the first support rod 61 can resist the extrusion force of cement slurry injected into the drilling part above the water-proof capsule 5 to the water-proof capsule 5, so that the space in the water-proof capsule 5 is not occupied, and the stability of the water-proof capsule 5 is improved.

In order to increase the deployment supporting force applied to the water-blocking bladder 5, further improving the stability of the water-blocking bladder 5, specifically, the inner bottom wall of the water-blocking bladder 5 is provided with a third connecting plate 52, the third connecting plate 52 is located right under the first connecting plate 12 in the height direction, and the lower end of the elastic member 13 is connected to the third connecting plate 52; each folding support assembly further comprises a second support rod 62, the lower end of the second support rod 62 is hinged to the third connecting plate 52, and the upper end of the second support rod 62 and the lower end of the first support rod 61 are hinged to the same position in the middle of the inner wall of the waterproof bag body 5.

In some embodiments of the present invention, a second connection plate 51 is disposed at the opening of the water-proof bladder 5, and the second connection plate 51 is detachably connected to the lower end surface of the first connection plate 12 along the height direction; the upper end of the first support bar 61 in the height direction is hinged to the second connection plate 51. The waterproof bag body 5 and the anchor rod main body 1 can be split, so that the waterproof bag body 5 and the anchor rod main body 1 can be transported to a construction site for assembly, occupied space in the transportation process is reduced, and transportation cost is reduced.

In this embodiment, the detachable connection structure between the first connection plate 12 and the second connection plate 51 is not limited, and in order to improve the convenience of assembling and disassembling the two on the basis of ensuring the connection tightness of the two, as shown in fig. 3 and fig. 4, preferably, a plurality of first through holes are uniformly distributed on the first connection plate 12 along the circumferential direction, preferably four first through holes are formed here, and each first through hole penetrates through the first connection plate 12 along the height direction; a second through hole is formed on the second connecting plate 51 at a position corresponding to the first through hole in a penetrating manner along the height direction; when in connection, only four first fastening bolts 71 are needed to pass through the four first through holes and the four second through holes in sequence respectively and are screwed with first fastening nuts 72, so that the assembly can be completed, and the operation is simple. Of course, in other embodiments, a plurality of clamping grooves are formed in the lower end of the first connecting plate 12 along the circumferential direction, a clamping block is convexly disposed at a position of the upper end of the second connecting plate 51 corresponding to the clamping groove, and when the second connecting plate 51 is assembled on the second connecting plate 51, the clamping block is in interference fit and inserted in the clamping groove. The above structure can also provide an effect of detachably connecting the first connection plate 12 and the second connection plate 51.

In some embodiments of the present invention, a connection portion is provided at a lower end of the elastic member 13 in a height direction, an internal threaded hole is provided in a lower end of the connection portion, a third through hole is formed on the third connection plate 52 at a position corresponding to the internal threaded hole in the height direction, and when the third connection plate 52 is connected to the elastic member 13, a second fastening bolt passes through the third through hole and is screwed into the internal threaded hole; the third connecting plate 52 and the elastic piece 13 are detachably connected in a threaded connection mode of the second fastening bolt and the internal threaded hole, so that the waterproof bag body 5 and the anchor rod main body 1 are integrated after being separately transported to a construction site, and the operation is simple and convenient.

As shown in fig. 1 and 2, in some embodiments of the present invention, the anti-floating anchor structure further includes a cushion layer 81 and a waterproof layer 82, where the cushion layer 81 is used to be laid on the upper end surface of the foundation 2, and the cushion layer 81 plays a role in isolating the ground of the foundation 2 and performing preliminary leveling; the waterproof layer 82 is disposed on an upper end surface of the cushion layer 81, and the upper end surface of the waterproof layer 82 is used for abutting against a lower end surface of the foundation raft 3; the waterproof layer 82 can prevent the capillary water at the bottom from penetrating upwards along the anchor rod reinforcing steel bars 11, so that the water stopping effect of the anti-floating anchor rod structure of the embodiment is further improved; perforations are formed in the cushion layer 81 and the waterproof layer 82 in a penetrating manner in the height direction at positions corresponding to the anchor rod main body 1, and the perforations allow the anchor rod main body 1 to pass through. Specifically, after the waterproof bag body 5 is placed in a drilling hole along with the anchor rod main body 1 and grouting is completed in the drilling hole, concrete is poured on the ground of the foundation 2 to form a cushion layer 81, then a waterproof layer 82 is made on the cushion layer 81, a layer of waterproof coiled material is paved at the upper end of the cushion layer 81 to form the waterproof layer 82, and finally concrete is poured at the upper end of the waterproof layer 82 to obtain the foundation raft 3.

As shown in fig. 2, in some embodiments of the present invention, each anchor bar 11 is sleeved with an inverted water stop ring 111, and an upper end surface of the inverted water stop ring 111 abuts against a lower end surface of the waterproof layer 82; the water stop steel plate 112 is sleeved on the anchor body 1, and the water stop steel plate 112 is positioned right above the inverted water stop ring 111 along the height direction and is abutted against the upper end surface of the waterproof layer 82. The inverted water stop ring 111 carries out water proof treatment to the anchor node of stock reinforcing bar 11, and the anchor node is the region of stock reinforcing bar 11 and cushion layer 81 junction to cooperate water stop steel sheet 112 to restrict the degree of freedom of waterproof layer 82 along the direction of height, can more effectually prevent that bottom capillary water from upwards permeating to foundation raft 3 along stock reinforcing bar 11, further improves the stagnant water effect of anti-floating anchor structure of this embodiment, has reduced the later stage because of the repair construction cost of foundation raft 3 infiltration. Specifically, before the waterproof bag body 5 is placed into the drill hole together with the anchor rod main body 1, an inverted water stop ring 111 is sleeved at the anchoring joint of each anchor rod reinforcing steel bar 11; more specifically, after a waterproof layer 82 is formed by laying a layer of waterproof coiled material on the upper end of the cushion layer 81, and before the foundation raft 3 is obtained by pouring concrete on the upper end of the waterproof layer 82, the water-stop steel plate 112 is sleeved on the anchor rod main body 1, the water-stop steel plate 112 is abutted against the upper end face of the waterproof layer 82, and the waterproof layer 82 is compacted.

As shown in fig. 2, in some embodiments of the present invention, the upper end of each anchor bar 11 is sleeved with a water stop ring 113, and the lower end surface of the water stop ring 113 abuts against the upper end surface of the waterproof layer 82. The water stop ring 113 is additionally provided with a water stop line for preventing capillary water at the bottom from penetrating upwards to the foundation raft 3 along the anchor rod reinforcing steel bars 11, so that the water stop effect of the anti-floating anchor structure of the embodiment is further improved. Specifically, after the waterproof steel plate 112 is abutted against the upper end surface of the waterproof layer 82 and the waterproof layer 82 is compacted, and before the foundation raft 3 is obtained by casting concrete at the upper end of the waterproof layer 82, a waterproof ring 113 is wound around each anchor bar reinforcing bar 11, and the waterproof ring 113 is abutted against the upper end surface of the waterproof steel plate 112.

As shown in fig. 1, 6 and 7, in some embodiments of the present invention, a portion of the anchor rod body 1 located in the borehole is provided with a plurality of locators 9 at intervals along the height direction, and an outer side wall of the locators 9 is used for abutting against an inner wall of the borehole; so the locator 9 is gone up and is run through along the direction of height and is formed with connecting hole 91, the internal diameter of connecting hole 91 is greater than the external diameter of stock main part 1, the locator 9 is gone up along circumference equipartition has three linking bridge 92, and three linking bridge 92 is towards the one end at stock main part 1 center is fixed connection respectively on three stock reinforcing bar 11. The locator 9 is fixed with three stock reinforcing bar 11 respectively through three linking bridge 92 for three stock reinforcing bar 11 of stock main part 1 passes through locator 9 to be connected into an organic wholely, and the external diameter of locator 9 equals with the internal diameter of drilling, make the in-process of injecting into grout in to the drilling, the lateral wall butt laminating in the inner wall of drilling all the time of locator 9, thereby the central line coincidence of central line and the drilling of messenger's locator 9, and then ensure that stock main part 1 is in the central line of drilling all the time in the in-process of grouting to the drilling, do not produce the slope, ensure the straightness that hangs down of stock main part 1, thereby effectually prevent stock main part 1 production eccentric tensile stress, and then effectually avoid causing the destruction to basic raft 3. Specifically, before the waterproof bag body 5 is placed into the drill hole together with the anchor rod main body 1, the positioner 9 with the corresponding size is selected according to the inner diameter of the drill hole, then the positioner 9 is sleeved outside the anchor rod main body 1 and moved to a set position, and then the three connecting brackets 92 are fixedly connected with the three anchor rod reinforcing steel bars 11 respectively in a welding mode.

In a specific application, the number of the positioners 9 is reasonably selected according to the length of the portion of the anchor rod main body 1 placed in the drill hole, for example, in other embodiments, the positioners 9 are two, three, four, etc. in number, and two adjacent positioners 9 are arranged at intervals of two meters.

In order to further improve the connection structure strength between the anchor bar 11 and the positioner 9, as shown in fig. 7, specifically, each anchor bar 11 is connected to the inner wall of the positioner 9 through two connection brackets 92, and the two connection brackets 92 connected to each anchor bar 11 are symmetrically disposed at two ends of the positioner 9 along the height direction.

As shown in fig. 7, more specifically, the connecting bracket 92 is provided with a mounting plate 93 along the length direction of the connecting bracket 92 towards one end of the anchor bar 11, the mounting plate 93 is arranged parallel to the anchor bar 11, and the mounting plate 93 increases the contact connection area with the anchor bar 11, thereby improving the connection strength of the connecting bracket 92 and the corresponding anchor bar 11, and further improving the connection structure strength of the anchor bar 11 and the positioner 9.

Example two

Fig. 1 to 7 show a construction method provided in this embodiment, for constructing the anti-floating anchor structure according to the first embodiment in the foundation 2, the construction method includes the following steps:

measuring the area to be anti-floating of the building, determining the position where the anchor rod is required to be anti-floating reinforced, and marking the position where the anchor rod is arranged on the foundation 2;

drilling a drilling hole with a required depth at the position marked with the anchor rod on the foundation 2;

three anchor bar 11 with required length are selected, the three anchor bar 11 are uniformly distributed and connected into a whole along the circumferential direction to form an anchor bar main body 1, and the three anchor bar 11 enclose a mounting hole;

a first connecting plate 12 is arranged at a set position of the lower end of the outer side wall of the anchor rod main body 1;

the upper end of the water-proof capsule 5 is connected with the first connecting plate 12, the lower end part of the anchor rod main body 1 extends into the water-proof capsule 5, and an elastic piece 13 is arranged between the lower end surface of the anchor rod main body 1 and the inner bottom wall of the water-proof capsule 5 along the height direction;

placing the water-proof bag body 5 together with the anchor body 1 into the drill hole until the anchor body 1 is sunk in place;

placing the grouting pipe 4 into the mounting hole until the grouting pipe descends into the waterproof bag body 5, connecting the upper end of the grouting pipe 4 with a grouting machine, injecting cement slurry through the grouting pipe 4, enabling the cement slurry to flow into the waterproof bag body 5 at first, and gradually expanding the waterproof bag body 5 along with filling of the cement slurry until the outer surface of the waterproof bag body 5 is abutted against the inner side wall and the inner bottom wall of the drill hole;

and then cement slurry is injected through the grouting pipe 4, overflows from the opening of the waterproof bag body 5 and flows into the drilling hole until the drilling hole is filled, and the anti-floating anchor rod structure is manufactured after the cement slurry is solidified.

The construction method of the embodiment comprises the steps that the lower end part of the anchor rod main body 1 extends into the waterproof bag body 5, and an elastic piece 13 is connected between the inner bottom wall of the waterproof bag body 5 and the lower end face of the anchor rod main body 1; in the construction method of the embodiment, when the grouting construction is performed after the waterproof bag body 5 is placed in a drill hole along with the anchor rod main body 1 and is settled in place, because the grouting end of the grouting pipe 4 extends into the waterproof bag body 5, the cement slurry flowing out of the grouting pipe 4 in a high-pressure grouting mode firstly flows into the waterproof bag body 5, and the impact force of the cement slurry flowing out of the grouting pipe in a high-pressure grouting mode is reduced by utilizing the performance of elastic deformation absorption energy of the elastic piece 13, so that the impact on the inner bottom wall of the waterproof bag body 5 and the inner bottom wall of the drill hole in the grouting construction process is reduced, the generation of scum is reduced, and the grouting amount of the cement slurry is saved; the cement slurry is smoothly filled into the water-proof capsule body 5, the water-proof capsule body 5 is gradually spread until the outer surface of the water-proof capsule body 5 is abutted against the inner side wall and the inner bottom wall of the drill hole, and the root of the lower end of the anchor rod main body 1 is basically completely water-proof, so that the anti-floating anchor rod structure prepared by the construction method of the embodiment effectively blocks the corrosion of underground water to the anchor rod reinforcing steel bar 11 from the source, and the service life of the anti-floating anchor rod structure is prolonged; and the effective ground water that insulates upwards permeates through stock reinforcing bar 11 along the root space of stock main part 1 to the effectual phenomenon of 3 oozes of basic raft that avoids appearing has improved waterproof quality, has reduced the repair construction cost of later stage because of 3 oozes of basic raft. In the construction process of the construction method of the embodiment, three anchor bar steel bars 11 uniformly distributed along the circumferential direction form the anchor bar main body 1, and compared with the anchor bar main body 1 formed by single anchor bar steel bars 11, the outer diameter of the section of the anchor bar main body 1 perpendicular to the height direction of the anti-floating anchor structure manufactured by the construction method of the embodiment is larger, so that the vertical load bearing performance of the anti-floating anchor structure manufactured by the construction method of the embodiment is better, and the overall structural life of the anti-floating anchor structure manufactured by the construction method of the embodiment is prolonged.

It should be noted that, because the elastic member 13 is connected between the inner bottom wall of the waterproof bag body 5 and the lower end face of the anchor rod main body 1, when the cement slurry flowing out from the grouting pipe 4 in a high-pressure grouting manner initially flows into the waterproof bag body 5, the elastic member 13 can reduce the impact force of the cement slurry flowing out from the grouting pipe in a high-pressure grouting manner, effectively avoid the inclination of the anchor rod main body 1 caused by the impact generated in the grouting construction process, ensure the perpendicularity of the anchor rod main body 1, thereby effectively preventing the eccentric tensile stress of the anchor rod main body 1 and further effectively avoiding the damage to the foundation raft 3. Simultaneously, cement slurry is injected into the waterproof bag body 5 at first, and after the waterproof bag body 5 is spread until the outer surface of the waterproof bag body 5 is abutted against the inner side wall and the inner bottom wall of the drill hole, cement slurry is injected into the drill hole part above the waterproof bag body 5, and at the moment, the completely spread waterproof bag body 5 plays a role in positioning, so that the anchor rod main body 1 can be ensured not to incline.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims (10)

1. An anti-floating anchor structure, comprising:

the anchor rod main body (1) is used for being installed in a drilling hole of the foundation (2), and the upper end of the anchor rod main body in the height direction extends out of the drilling hole and is used for being connected with the foundation raft (3); the anchor rod main body (1) comprises three anchor rod reinforcing steel bars (11) which are uniformly distributed along the circumferential direction, wherein the three anchor rod reinforcing steel bars (11) enclose a mounting hole, and the mounting hole is arranged in parallel to the height direction;

grouting pipes (4) arranged in the mounting holes;

the first connecting plate (12) is arranged at the lower end of the outer side wall of the anchor rod main body (1) and is used for being installed in a drill hole;

the waterproof bag body (5) is provided with the opening along the upper end of direction of height, and along the up end of direction of height connect in on first connecting plate (12), the lower extreme setting of stock main part (1) is in waterproof bag body (5), the interior bottom wall of waterproof bag body (5) along direction of height pass through elastic component (13) with the lower terminal surface of stock main part (1) is connected, the surface of waterproof bag body (5) is used for the butt laminating in the inner wall of drilling.

2. An anti-floating anchor structure according to claim 1, characterized in that the lower end face of the anchor body (1) is provided with a sleeve (14), the sleeve (14) is arranged along the height direction, the elastic member (13) is provided as a spring, the spring is sleeved in the sleeve (14), and the lower end along the height direction extends out of the sleeve (14) and is connected to the inner bottom wall of the water-proof capsule (5).

3. An anti-floating anchor structure according to claim 1 or 2, further comprising a plurality of folding support assemblies, a plurality of said folding support assemblies being circumferentially spaced around the anchor body (1); each folding support assembly comprises a first support rod (61), wherein the upper end of the first support rod (61) in the height direction is hinged to the first connecting plate (12), and the lower end of the first support rod in the height direction is hinged to the middle of the inner wall of the waterproof bag body (5).

4. An anti-floating anchor structure according to claim 3, characterized in that a second connecting plate (51) is arranged at the opening of the water-proof capsule (5), and the second connecting plate (51) is detachably connected to the lower end face of the first connecting plate (12) along the height direction; the upper end of the first supporting rod (61) along the height direction is hinged to the second connecting plate (51);

and/or, the inner bottom wall of the water-proof bag body (5) is provided with a third connecting plate (52), the third connecting plate (52) is positioned right below the first connecting plate (12) along the height direction, and the lower end of the elastic piece (13) is connected to the third connecting plate (52); each folding support assembly further comprises a second support rod (62), the lower end of the second support rod (62) is hinged to the third connecting plate (52), and the upper end of the second support rod (62) and the lower end of the first support rod (61) are hinged to the same part of the middle part of the inner wall of the waterproof bag body (5).

5. An anti-floating anchor structure according to claim 4, wherein a plurality of first through holes are uniformly distributed on the first connecting plate (12) along the circumferential direction, and each first through hole penetrates through the first connecting plate (12) along the height direction; the second through holes are formed in the second connecting plate (51) in a penetrating manner along the height direction at positions corresponding to the first through holes; when in connection, a first fastening bolt (71) sequentially passes through the first through hole and the second through hole and is screwed with a first fastening nut (72).

6. The anti-floating anchor structure according to claim 4, wherein a connecting portion is provided at a lower end of the elastic member (13) in a height direction, an internal threaded hole is provided in a lower end of the connecting portion, and a third through hole is formed in the third connecting plate (52) at a position corresponding to the internal threaded hole in the height direction; when in connection, the second fastening bolt passes through the third through hole and is screwed into the internal threaded hole.

7. The anti-floating anchor structure according to claim 1, further comprising a cushion layer (81) and a waterproof layer (82), wherein the cushion layer (81) is used for being paved on the upper end face of a foundation (2), the waterproof layer (82) is arranged on the upper end face of the cushion layer (81), and the upper end face of the waterproof layer (82) is used for being abutted against the lower end face of a foundation raft (3); the positions of the cushion layer (81) and the waterproof layer (82) corresponding to the anchor rod main body (1) are respectively provided with a perforation in a penetrating mode along the height direction, and the perforation is used for the anchor rod main body (1) to penetrate through.

8. An anti-floating anchor structure according to claim 7, wherein each anchor rod reinforcing steel bar (11) is sleeved with an inverted water stop ring (111), and the upper end surface of the inverted water stop ring (111) is abutted against the lower end surface of the waterproof layer (82); the water stop steel plate (112) is sleeved on the anchor rod main body (1), and the water stop steel plate (112) is positioned right above the inverted water stop ring (111) along the height direction and is abutted to the upper end surface of the waterproof layer (82);

and/or, the upper end of each anchor rod reinforcing steel bar (11) is sleeved with a water stop ring (113), and the lower end face of the water stop ring (113) is abutted to the upper end face of the waterproof layer (82).

9. An anti-floating anchor structure according to claim 1, characterized in that a plurality of positioners (9) are arranged at intervals along the height direction on the part of the anchor rod main body (1) positioned in the drilling hole, and the outer side wall of each positioner (9) is used for abutting against the inner wall of the drilling hole; so be formed with connecting hole (91) along the direction of height on locator (9), the internal diameter of connecting hole (91) is greater than the external diameter of stock main part (1), on locator (9) along circumference equipartition have three linking bridge (92), three linking bridge (92) towards the one end at stock main part (1) center is fixed connection respectively on three stock reinforcing bar (11).

10. A construction method for constructing an anti-floating anchor structure according to any one of claims 1 to 9 in a foundation (2), comprising the steps of:

measuring a to-be-anti-floating area of a building, determining a position where anchor rod anti-floating reinforcement is needed, and marking the position where the anchor rod is arranged on a foundation (2);

drilling a drilling hole with a required depth at the position marked with the anchor rod on the foundation (2);

three anchor bar (11) with required length are selected, the three anchor bar (11) are uniformly distributed and connected into a whole along the circumferential direction to form an anchor bar main body (1), and the three anchor bar (11) are surrounded into a mounting hole;

a first connecting plate (12) is arranged at a set position of the lower end of the outer side wall of the anchor rod main body (1);

the upper end of the water-proof capsule body (5) is connected with a first connecting plate (12), the lower end part of the anchor rod main body (1) extends into the water-proof capsule body (5), and an elastic piece (13) is arranged between the lower end surface of the anchor rod main body (1) and the inner bottom wall of the water-proof capsule body (5) along the height direction;

placing the water-proof bag body (5) into the drill hole along with the anchor rod main body (1) until the anchor rod main body (1) is sunk in place;

placing the grouting pipe (4) into the mounting hole until the grouting pipe descends into the waterproof bag body (5), connecting the upper end of the grouting pipe (4) with a grouting machine, injecting cement slurry through the grouting pipe (4), enabling the cement slurry to flow into the waterproof bag body (5) at first, and gradually expanding the waterproof bag body (5) along with the filling of the cement slurry until the outer surface of the waterproof bag body (5) is abutted against and attached to the inner side wall and the inner bottom wall of a drill hole;

and then cement slurry is injected through the grouting pipe (4), the cement slurry flows into the drilled hole from the opening of the water-proof capsule body (5) until the drilled hole is filled, and the anti-floating anchor rod structure is manufactured after the cement slurry is solidified.