CN215562584U - Pre-tensioning method prestress anti-floating anchor rod construction node - Google Patents

Abstract

The application relates to a pre-tensioning method prestressed anti-floating anchor rod construction node, which relates to the field of prestressed anti-floating anchor rods and comprises anchor rods, concrete pier bodies and structural bottom plates; the stock is worn to establish in the drilling, the concrete pier body sets up in the construction groove, the perforation has been seted up to the centre of the concrete pier body, the perforation run through in the concrete pier body, the structure bottom plate sets up concrete pier body upper surface, the top of stock is passed the perforation just extends to in the structure bottom plate. The method has the effects of shortening the construction period and saving the cost.

Description

Pre-tensioning method prestress anti-floating anchor rod construction node

Technical Field

The application relates to the field of prestressed anti-floating anchor rods, in particular to a pretensioning method prestressed anti-floating anchor rod construction node.

Background

The anti-floating anchor rod is an anti-floating technology adopted by underground structures to resist water buoyancy, is widely applied at home and abroad, and especially plays an irreplaceable important role increasingly along with the increasing burial depth of underground engineering such as building basements, subways, underground traffic hubs, underground spaces, hydraulic buildings and the like at home in recent years.

Conventional prestressing force anti-floating anchor rod construction carries out the stretch-draw of prestressed anchor rod again after the completion is pour to the structural bottom plate, and this kind of condition anchor rod construction is longer to stretch-draw process latency, leads to the stock to take place easily phenomenon such as rust, destruction, just so need protect the stock again to the protection cost has been increased.

In view of the above-mentioned related technologies, the inventor thinks that the existing prestressed anti-floating anchor rod has the defects of long construction period and high cost in construction.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems of long construction period and high cost in the construction of the existing prestressed anti-floating anchor rod, the application provides a pre-tensioning method prestressed anti-floating anchor rod construction node.

The application provides a pretensioning method prestressing force anti-floating anchor rod construction node adopts following technical scheme:

the pre-tensioning method prestressed anti-floating anchor rod construction node comprises an anchor rod, a concrete pier body and a structural bottom plate; the stock is worn to establish in the drilling, the concrete pier body sets up in the construction groove, the perforation has been seted up to the centre of the concrete pier body, the perforation run through in the concrete pier body, the structure bottom plate sets up concrete pier body upper surface, the top of stock is passed the perforation just extends to in the structure bottom plate.

By adopting the technical scheme, during construction, earth excavation is firstly carried out, then a hole is drilled in a soil body, and a steel bar is placed in the hole and grouting is carried out to form an anchor rod; excavating a groove at the anchor rod position by taking the anchor rod as a center, pouring high-grade concrete in the groove to form a concrete pier body, extending the upper end of the anchor rod out of the upper surface of the concrete pier body, and tensioning the anchor rod after the concrete pier body reaches the strength; and finally, the upper surface of the concrete pier body is constructed with the structural bottom plate, the part of the anchor rod extending out of the concrete pier body is poured together with the structural bottom plate, the structural bottom plate is ensured to be complete without holes, the whole construction process is continuous, the waiting time is reduced, the construction progress is accelerated, meanwhile, the influence of the anchor rod on the related construction of the structure is also reduced, and the protection cost of the anchor rod is reduced.

Optionally, an anchoring plate is arranged at one end of the anchor rod extending into the structural bottom plate.

Through adopting above-mentioned technical scheme, the jam between the anchor rod top and the framework of steel reinforcement in the structural bottom plate has been solved in setting up of anchor plate, and the setting of anchor plate has also strengthened being connected between anchor rod and the structural bottom plate simultaneously, makes anchor rod and structural bottom plate be connected more firmly.

Optionally, be provided with many water swelling sealing strips on the stock, many water swelling sealing strip sets up respectively the stock is close to the one end of anchor plate with the stock is close to concrete pier body upper surface department.

Through adopting above-mentioned technical scheme, when the structure bottom plate received the welfare of groundwater, lead to between structure bottom plate and the concrete pier body, when producing the gap between structure bottom plate and the stock, groundwater enters into the structure bottom plate along these seams in, the water-swelling sealing rod of meeting water inflation that this moment sets up on the stock can absorb these groundwater, and the sealing rod inflation, blocks up the crack between stock and the structure bottom plate, plays the effect of protection to stock and structure bottom plate your steel reinforcement framework.

Optionally, the upper surface of the concrete pier body and the lower surface of the structure bottom plate are parallel and level, a waterproof layer is laid on the upper surface of the concrete pier body, and the lower surface of the structure bottom plate is attached to the waterproof layer.

Through adopting above-mentioned technical scheme, the setting of waterproof layer avoids groundwater to permeate the structure bottom plate along the crack between the concrete pier body and the structure bottom plate in to the structure of structure bottom plate has been protected.

Optionally, the anchor rod is sleeved with a protective sleeve, and the protective sleeve is located between the concrete pier body and the structural bottom plate.

Through adopting above-mentioned technical scheme, when appearing the crack between the concrete pier body and the structure bottom plate, the setting up of protective sheath can completely cut off groundwater outside protective sheath, protects the stock, avoids the stock to meet water for a long time and produces the corrosion.

Optionally, a protrusion is disposed on the outer circumferential surface of the protective sleeve.

Through adopting above-mentioned technical scheme for the protective sheath is connected more firmly with concrete pier body, structure bottom plate respectively.

Optionally, a support is erected on the protective sleeve, and the bottom end of the support is supported at the bottom of the construction groove.

Through adopting above-mentioned technical scheme, erect the protective sheath in the construction groove through the support, at this moment to the concrete of pouring in the construction groove, guarantee that the protective sheath overlaps on the stock and establish stably.

In summary, the present application includes at least one of the following beneficial technical effects:

the whole construction process is continuous, the waiting time is reduced, the construction progress is accelerated, meanwhile, the influence of the anchor rod on the construction related to the structure is reduced, and the protection cost of the anchor rod is reduced;

the jam between the anchor rod top and the framework of steel reinforcement in the structural bottom plate has been solved in setting up of anchor board, and the setting of anchor board has also strengthened being connected between anchor rod and the structural bottom plate simultaneously, makes anchor rod and structural bottom plate be connected more firmly.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present application.

Figure 2 is a schematic view of the installation of the protective sleeve in the embodiment of the present application.

Description of reference numerals: 1. an anchor rod; 2. a concrete pier body; 21. perforating; 3. a structural floor; 4. drilling; 5. constructing a slot; 6. a waterproof layer; 7. an anchoring plate; 8. a protective sleeve; 81. a protrusion; 82. a support; 821. a circular ring; 822. a support leg; 9. an anchor backing plate; 91. an anchorage device; 10. a water stop rod expanding when meeting water.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses pretensioning method prestressing force anti-floating anchor rod construction node. Referring to fig. 1, the pretensioned prestressing anti-floating anchor construction node includes an anchor 1, a concrete pier body 2 and a structural bottom plate 3; a drill hole 4 is formed in the bottom of the foundation pit, the anchor rod 1 penetrates through the drill hole 4, and one end, far away from the bottom of the drill hole 4, of the anchor rod 1 extends out of the drill hole 4; the construction groove 5 is opened to the foundation ditch bottom, construction groove 5 uses stock 1 to excavate to the periphery as the center, the longitudinal section of construction groove 5 is down trapezoidal for construction groove 5's horizontal plane reduces gradually from last down, perhaps excavate the construction groove 5 into the cuboid, concreting in construction groove 5 again, form concrete pier body 2 after the concrete sets up, concrete pier body 2 also can be prefabricated, this construction groove 5 is filled up to concrete pier body 2, the one end that stock 1 stretches out drilling 4 passes concrete pier body 2, make and form perforation 21 between stock 1 and the concrete pier body 2.

Referring to fig. 1, structure bottom plate 3 sets up the upper surface at the concrete pier body 2, make the lower surface of structure bottom plate 3 and the upper surface parallel and level of the concrete pier body 2, and be provided with waterproof layer 6 at the concrete upper surface, groundwater is avoided along the gap infiltration structure bottom plate 3 between the concrete pier body 2 and the structure bottom plate 3 in the setting of waterproof layer 6, the stock 1 passes the one end of perforation 21 and extends to inside the structure bottom plate 3, and this end is equipped with anchor plate 7 admittedly, anchor plate 7 level sets up, make the length direction and the anchor plate 7 of stock 1 perpendicular, the connection between stock 1 and the structure bottom plate 3 has been strengthened.

Referring to fig. 1, a protective sleeve 8 is sleeved on an anchor rod 1, the protective sleeve 8 is positioned at the joint of a concrete pier body 2 and a structural bottom plate 3, one end of the protective sleeve 8 extends into the concrete pier body 2, and the other end of the protective sleeve 8 extends into the structural bottom plate 3; protective sheath 8 becomes cylindricly, and protective sheath 8 can adopt the duroplasts, is provided with a plurality of archs 81 on protective sheath 8's the outer wall, and protruding 81 is interlock mutually with the concrete for protective sheath 8 and concrete pier body 2, structure bottom plate 3 firm in connection.

Referring to fig. 2, a support 82 is arranged on the outer wall of the protective sleeve 8, the support 82 is arranged on the portion of the protective sleeve 8 located in the concrete pier 2, the support 82 includes a ring 821 and support legs 822, the ring 821 is sleeved on the outer wall of the protective sleeve 8, the support legs 822 are uniformly arranged around the circumferential interval of the ring 821, one end of each support leg 822 is welded to the outer circumferential surface of the ring 821, and the other end of each support leg abuts against the bottom of the construction groove 5, so that the protective sleeve 8 is erected at the junction of the concrete pier 2 and the structural bottom plate 3 through the support 82.

Referring to fig. 1, anchor rod 1 is close to concrete pier body 2 upper surface department and is provided with anchor backing plate 9, and anchor backing plate 9 is located protective sheath 8, and one side that concrete pier body 2 was kept away from to anchor backing plate 9 is provided with ground tackle 91, and anchor rod 1 stretches out the one end of perforation 21 and passes anchor backing plate 9 and ground tackle 91 in proper order, carries out stretch-draw locking to anchor rod 1, anchors concrete pier body 2 in the soil body of foundation ditch below. A plurality of water-swelling water stop strips 10 are arranged on the part of the anchor rod 1 extending into the structural bottom plate 3, and the water-swelling water stop strips 10 are respectively arranged at the position, close to the anchorage device 91, of the anchor rod 1 and at one end, extending out of the through hole 21, of the anchor rod 1; receive groundwater buoyancy and when producing the come-up when structure bottom plate 3, structure bottom plate 3 and concrete pier body 2, can produce the gap between structure bottom plate 3 and the stock 1, lead to groundwater to be along these gap infiltration structure bottom plate 3 in, when groundwater meets water inflation sealing rod 10, water inflation sealing rod 10 absorbs water and expands, thereby plug up the gap between stock 1 and structure bottom plate 3, avoid groundwater infiltration structure bottom plate 3 inside depths, produce the influence to the structural strength of stock 1 and structure bottom plate 3.

The implementation principle of the application is as follows: firstly, excavating earthwork, arranging a drill hole 4 at the bottom of a foundation pit, penetrating an anchor rod 1 into the drill hole 4, then arranging a facility working groove 5 at the bottom of the foundation pit, pouring concrete into the construction groove 5, solidifying the concrete to form a concrete pier body 2, extending one end of the anchor rod 1 extending out of the drill hole 4 out of the upper surface of the concrete pier body 2, at the moment, the anchor rod 1 is tensioned to ensure that the concrete pier body 2 is more firmly connected with the soil body below the foundation pit, the anchoring plate 7 is fixedly arranged at one end of the anchor rod 1 extending out of the concrete pier body 2, and finally the construction of the structural bottom plate 3 is carried out, wherein the structural bottom plate 3 is a reinforced concrete structure, the anchor rod 1 and the structural bottom plate 3 are more firmly connected by the arrangement of the anchoring plate 7, which is the approximate flow of the construction, through the construction method, the construction process is continuous, the waiting time in the construction process is reduced, the construction period is shortened, and the influence of the anchor rod 1 on the construction related to the structure and the protection cost of the anchor rod 1 are reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (7)

1. The pretensioning method prestressing force anti-floating anchor rod construction node is at foundation ditch bottom drilling (4) earlier, opens facility worker groove (5) again in foundation ditch bottom, and the center that construction groove (5) used drilling (4) is the outside excavation of center, its characterized in that: comprises an anchor rod (1), a concrete pier body (2) and a structural bottom plate (3); anchor bolt (1) is worn to establish in drilling (4), the concrete pier body (2) set up in construction groove (5), perforation (21) have been seted up to the centre of the concrete pier body (2), perforation (21) run through in the concrete pier body (2), structure bottom plate (3) set up concrete pier body (2) upper surface, the top of anchor bolt (1) is passed perforation (21) and extend to in structure bottom plate (3).

2. The pretensioned prestressed anti-floating anchor construction joint according to claim 1, wherein: and an anchoring plate (7) is arranged at one end of the anchor rod (1) extending into the structural bottom plate (3).

3. The pretensioned prestressed anti-floating anchor construction joint according to claim 2, wherein: be provided with many water inflation sealing rod (10) on stock (1), many water inflation sealing rod (10) set up respectively stock (1) be close to the one end of anchor plate (7) with stock (1) is close to concrete pier body (2) upper surface department.

4. The pretensioned prestressed anti-floating anchor construction joint according to claim 1, wherein: the upper surface of the concrete pier body (2) and the lower surface parallel and level of the structure bottom plate (3), just waterproof layer (6) have been laid on the upper surface of the concrete pier body (2), the lower surface of the structure bottom plate (3) and the waterproof layer (6) are laminated.

5. The pretensioned prestressed anti-floating anchor construction joint according to claim 1, wherein: the anchor rod (1) is sleeved with a protective sleeve (8), and the protective sleeve (8) is located between the concrete pier body (2) and the structural bottom plate (3).

6. The pretensioned prestressed anti-floating anchor construction joint according to claim 5, wherein: and a bulge (81) is arranged on the outer peripheral surface of the protective sleeve (8).

7. The pretensioned prestressed anti-floating anchor construction joint according to claim 5, wherein: the protective sheath (8) is put on the shelf and is equipped with support (82), the bottom support of support (82) is in construction groove (5) bottom.

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