CN202865841U - Non-metal anti-floating anchor rod - Google Patents

Abstract

The utility model belongs to the technical field of fixed anti-floating equipment in water areas, and relates to a non-metallic anti-floating anchor rod. The inner anchoring section includes two structural parts, a centering device and an anchor rod body, and the outer anchoring section includes a stress diffusion tray and a locking nut. It also includes the anchor hole and the concrete bottom plate; the stress diffusion tray is fixedly connected to the outer anchor section of the anchor, and leaves a distance of 20-40cm from the inner anchor section of the anchor, and the stress diffusion tray with a smooth inner surface is connected to the building foundation The concrete bottom plate is poured as a whole; the lock nut is fixedly connected to the outer anchoring section of the anchor rod body, and its inner end is connected with the clamp structure at the outer end of the stress diffusion tray; The round hole and the centering device are fixedly connected with the inner anchor section and the anchor rod body respectively; its structure is simple, easy to install and construct, high in operation safety, friendly in use environment, long in service life and wide in scope of application.

Description

A non-metallic anti-floating anchor rod

Technical field:

The utility model belongs to the technical field of fixed anti-floating equipment in water areas, and relates to an anti-floating anchor rod used in geotechnical engineering to resist groundwater buoyancy and improve the rock-soil foundation bearing capacity, in particular to a non-metallic anti-floating anchor rod.

Background technique:

With the development and utilization of urban underground space, the buried depth of building foundations continues to increase, and the problem of anti-floating in groundwater has become more and more prominent. , the anti-floating anchor has the advantages of strong stratum adaptability, distributed stress, convenient construction, and cost saving. It has a large bearing capacity in hard rock and soil layers and has more advantages; The ground is reinforced by the tension of the anchor and the grouting body integrated with the anchor, so that the formation forms an integral structure, so that the friction of the anchor is greater than the buoyancy of the water pressure, and plays the role of anti-floating, so as to control its purpose of deformation. According to the environment of the anchor and the durability requirements of the building (structure), the general anchor can be divided into temporary anchor and permanent anchor, and the latter requires the service life of the anchor to be decades or even hundreds of years. , the anti-floating anchor belongs to the latter. The rod body of the anti-floating anchor rod is mostly made of metal material. After it is buried in the rock mass soil layer, as time goes on, the rod body material is easy to corrode, which affects the strength of the anchor rod body, and then destroys its anchoring effect. The anti-floating aspect of the foundations of buildings (structures) in coastal areas is particularly prominent. In the construction of urban rail transit such as subways, the stray current generated by the DC power supply system also causes serious electrochemical corrosion of metal materials. Therefore, the anti-corrosion problem of anchor rods in the formation is very important.

At present, the anti-corrosion protection level and measures of the anchor rod should be determined according to the design service life of the anchor rod and whether the formation is corrosive or not. Anchor bolt anticorrosion mainly adopts isolation and insulation methods, mainly including grouting consolidation protection, anchor bolt galvanized layer, anchor bolt epoxy resin coating and casing wrapping, etc. When two of the above methods are used, it is called double anti-corrosion; when three or more of the above methods are used, it is called triple anti-corrosion. my country's geotechnical bolt (cable) technical regulations stipulate that for permanent anchor bolts of tension type and tension dispersion type in corrosive environments, Class I double-layer anti-corrosion protection structures should be adopted, that is, transition pipes should be used for anchor heads, and concrete should be used to seal anchors. Or steel cover protection, the free section is sheathed with grease, or unbonded steel strand, or unbonded steel strand with a jacket protection tube, and the anchor section is a corrugated tube injected with cement slurry. The existing anti-corrosion measures for bolts mainly include: using resistant alloy steel to make the bolt, anti-corrosion treatment for the surface of the bolt, and cathodic protection. However, due to the high price of corrosion-resistant low-alloy materials and the difficulty of smelting, it is not easy to adopt from an economic point of view; the anti-corrosion treatment and cathodic protection of the bolt surface adopt isolation and insulation protection measures, and the materials used may affect the anchorage strength and The grip force has a great influence, or the cost is high, and the anti-corrosion effect is not ideal, especially for urban traffic construction such as subways, the stray current generated by the DC power supply system, and the electrochemical corrosion of metal anchors cannot fundamentally solve it.

Invention content:

The purpose of the invention of the utility model is to overcome the shortcomings of the prior art, and provide a non-metallic anti-floating anchor rod with good corrosion resistance and long service life without increasing the construction cost.

In order to achieve the above purpose, the main body structure of the anchor rod of the present invention includes two butt-connected components, the inner anchor section and the outer anchor section. Tray and locknut, also includes anchor hole and concrete base plate; glass fiber reinforced polymer (GFRP) fully threaded solid construction long rod anchor body for corrosion resistance and tensile properties, with rough surface; stress spreading tray It is disc-shaped and fixedly connected to the outer anchoring section of the anchor rod by means of threaded connection, leaving a distance of 20-40cm from the inner anchoring section of the anchor rod to provide continuous anchoring force. The stress diffusion tray with smooth inner surface and The concrete bottom slab of the building (structure) foundation is poured as a whole; the lock nut of the hexagonal pile structure is fixedly connected to the outer anchor section of the anchor body by means of threaded connection, and its inner end is connected to the outer surface of the stress diffusion tray. The end clip structure is connected to provide anchoring force; the central part of the hexagonal centering device is made with a round hole through which the anchor body passes through and the anchor body is connected, and the centering device is respectively fixed with the inner anchoring section and the anchor body Connected to play the role of centering when the anchor rod is installed.

The material of the anchor rod body of the utility model is glass fiber reinforced polymer (GFRP), which has good corrosion resistance and tensile performance, and the full-thread solid structure can provide sufficient anchoring and gripping force; the surface of the stress diffusion tray is smooth, and the surface area Large, able to disperse and transmit the anchoring force, the size of the bottom surface is determined according to the anchoring force, and can be customized according to actual needs; the lock nut can provide sufficient locking force, and its inner end is clamped with the inner side of the stress diffusion tray to make it fit with the anchor The rod body is tightly connected, installed at one end of the anchor rod body to quickly form an anti-floating anchoring force, the length of the lock nut is determined according to the design anchoring force, and can be customized according to actual needs; the centering device plays an important role in the anchor rod installation process. For the centering effect during installation, the required quantity is determined according to the length of the inner anchoring section of the anchor rod body.

Compared with the prior art, the utility model has the following advantages: one is to use the anti-corrosion characteristics of the glass fiber reinforced polymer (GFRP) material itself to make a full-threaded GFRP anti-floating anchor rod, which can prolong the service life of the anchor rod body and prevent environmental corrosion; Serious building (structure) foundation strata provide reliable anti-floating measures, especially in the construction of urban rail transit such as subways, non-metallic anti-floating anchors become the best choice; the second is the use of full screw nuts for external anchoring It can provide reliable anchoring force; the third is simple structure, easy installation and construction, high operational safety, friendly use environment, long service life and wide application range.

Description of drawings:

Fig. 1 is the structural schematic diagram of the utility model.

Fig. 2 is a schematic diagram of the connection structure principle between the utility model and other parts.

Fig. 3 is a schematic sectional view of the structural principle of the centering device of the present invention.

Fig. 4 is a schematic cross-sectional view of the structure principle of the lock nut of the present invention.

Fig. 5 is a schematic sectional view of the structural principle of the stress diffusion tray of the present invention.

Detailed ways:

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Example:

The main structure of the non-metallic anti-floating anchor of this embodiment includes two components: an inner anchoring section 1 and an outer anchoring section 2. The inner anchoring section 1 includes two structural parts: a centering device 3 and an anchor body 4. The outer anchoring section 2 includes stress diffusion tray 5 and lock nut 6, including anchor hole 7 and concrete floor 8 during fixed installation; anchor body 4 is a glass fiber reinforced polymer (GFRP) fully threaded solid structure, which has good corrosion resistance and anti-corrosion Tensile performance; the stress diffusion tray 5 is disc-shaped, fixedly connected to the outer anchoring section 2 of the anchor rod by means of threaded connection, and leaves a distance of 20-40cm from the inner anchoring section 1 of the anchor rod to provide continuous anchoring force , the inner surface of the stress diffusion tray 5 is smooth, poured together with the concrete floor 8 of the building (structure) foundation; the lock nut 6 of the hexagonal pile structure is fixedly connected to the anchor rod body 4 by means of threaded connection On the outer anchoring section 2, its inner end is connected with the clamping structure of the outer end of the stress diffusion tray 5 to provide reliable anchoring force; the central part of the centering device 3 of the hexagonal structure forms a round hole through the anchor rod body 4, respectively It is fixedly connected with the inner anchor section 1 and the anchor body 4, and plays a centering role when the anchor is installed.

The material of the anchor rod body 4 in this embodiment is glass fiber reinforced polymer (GFRP), which has good corrosion resistance and tensile properties, and the fully threaded solid structure can provide sufficient anchoring and gripping force; the surface of the stress diffusion tray 5 is smooth , the surface area is large, it can disperse and transmit the anchoring force, the size of the bottom surface should be determined according to the anchoring force, and can be customized according to actual needs; the locking nut 6 can provide sufficient locking force, and its inner end is stuck in the inner side of the stress diffusion tray 5 Together, it is closely connected with the anchor body 4, installed at one end of the anchor body 4 to quickly form an anti-floating anchoring force, the length of the lock nut 6 is determined according to the designed anchoring force, and can be customized according to actual needs; the centering device 3 During the installation of the anchor rod, they play a centering role during the installation of the anchor rod, and the required quantity should be determined according to the length of the inner anchoring section 1 of the anchor rod body 4 .

The concrete steps that present embodiment realizes anchoring include:

(1) First, according to the size of the non-metallic anti-floating anchor, drill a hole in the rock foundation to form the anchor hole (or grouting hole) 7, and the anchor hole 7 is perpendicular to the ground;

(2) Fix the centering device 3 on the outer surface of the anchor body 4, and the distance between them should be determined according to the length of the anchor body;

(3) Insert the anchor body 4 equipped with the centering device 3 into the anchor hole 7 until the bottom of the anchor body 4 reaches the bottom of the anchor hole 7, and keep the anchor body 4 vertical during the installation process;

(4) Fixedly connect the grouting pipe to the outer end of the anchor hole 7, extend the grouting pipe to the bottom of the anchor hole 7, inject the concrete grout along the grouting pipe with a grouting pump, and wait until the concrete grout reaches the grouting pipe. Pull out the grouting pipe at the top of the grouting hole 7 and close the grouting pump to complete the entire grouting process;

(5) After the grouting is completed, the top of the grouting hole 7 is manually smoothed, and the stress diffusion tray 5 is installed on the outer anchorage section 2 of the anchor body 4. It cannot be screwed too deep or too shallow. The thickness is the control standard, and the bottom area of the stress diffusion tray 5 is controlled by the designed anchoring force;

(6) Fix and install the lock nut 6 on the outer end of the stress diffusion tray 5, and pre-tighten it with a wrench, so that the pre-tightening force reaches the feeling of tightening;

(7) Determine the length of the outer anchoring section 2 of the anchor body 4 according to the thickness of the concrete bottom plate 8 and the anti-floating requirements, and cut off the rest, so far the installation of the non-metallic anti-floating anchor is completed.

Claims (1)

1. nonmetal anti-float anchor rod, it is characterized in that agent structure comprises the ingredient of interior anchoring section and two docking of outer anchoring section, interior anchoring section comprises centralizer and two structure divisions of anchor bar body, outer anchoring section comprises stress diffusion pallet and locking nut, also comprises bolthole and concrete floor; The long-rod type anchor bar body of glass fiber reinforced polymer matter full thread solid construction has corrosion-resistant and tensile property, its rough surface; Stress diffusion pallet is discoid, be fixedly connected on the outer anchoring section of anchor pole with the mode that is threaded, and with anchor pole in anchoring section leave the distance of 20-40cm, the concrete floor notes of the smooth stress diffusion pallet of inner surface and building foundation water and are integrated; The locking nut of hexagonal piles formula structure adopts the mode that is threaded to be fixedly connected on the outer anchoring section of anchor bar body, and its inner is connected with stress diffusion pallet outer end clamping structure; The centre of the centralizer of hexagonal shape structure is shaped with the circular hole of anchor bar body perforation and anchor bar body is ganged up, and centralizer is fixedly linked with interior anchoring section and anchor bar body respectively.

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