CN202830778U

CN202830778U - Sealing device used for mud jacking

Info

Publication number: CN202830778U
Application number: CN 201220462210
Authority: CN
Inventors: 郭立强; 沈正; 贺涛; 张春伟; 纪志业; 胡畔
Original assignee: China Railway Sixth Group Co Ltd; China Railway Fengqiao Bridge Co Ltd
Current assignee: China Railway Sixth Group Co Ltd; China Railway Fengqiao Bridge Co Ltd
Priority date: 2012-09-12
Filing date: 2012-09-12
Publication date: 2013-03-27
Anticipated expiration: 2022-09-12

Abstract

The utility model discloses a sealing device used for mud jacking. According to the sealing device used for the mud jacking, the mud jacking can be carried out as soon as plugging is done, assembly and disassembly are convenient, and sealing effect is good. The sealing device used for the mud jacking comprises a pressing sleeve, a gland, an anchorage device, a screw and spring washers. The sealing device used for the mud jacking is characterized in that the gland is provided with a groove matched with the outer diameter of the pressing sleeve, the gland is pressed on the upper end of the pressing sleeve in a buckled mode through the groove, the lower end of the pressing sleeve is pressed on the upper surface of the anchorage device in a buckled mode, a screw hole is formed in the gland in a matched mode, the screw penetrates through the screw hole to be connected with an anchor bearing plate in a rotary mode, and the spring washers are arranged between the gland and the pressing sleeve and between the pressing sleeve and the anchorage device.

Description

A kind of mud jacking sealing device

Technical field

The utility model relates to the pumping of prostressed duct apparatus field, the anchor head sealing device of especially using during a kind of mud jacking.

Background technology

Hole path pressure grouting is operation very crucial in the post stressed concrete bridge, its objective is as guaranteeing that steel strand in the beam body prestressed pore passage are not by corrosion, make steel strand and beam physical efficiency that effective adhesive be arranged, reduce prestressed loss, whether closely knit mud jacking is, is directly connected to stability and the durability of prestressing force bridge perpetuity internal force.

Affect a closely knit key factor of mud jacking, it is the anchor head shutoff situation behind the prestressed pore passage cutting of steel twisted wire, the strength grade that general direct usefulness is mixed in traditional mud jacking technique is 42.5 Portland cement mortar shutoff anchor head, then with vacuum pump pipeline is evacuated behind the state, carries out mud jacking with mudjack again; Yet cement mortar shutoff anchor head is space and bubble is more, shutoff power Xiao Yi breaks not only, cause vacuum not reach and require or spillage, and waste labor and materials, cost are higher, in case the rear repairing difficulty of breaking is large; In addition, but this method is solidified to just mud jacking of some strength degree owing to must wait until cement mortar, can't reach the requirement that " the provisional technical condition of Line for Passenger Transportation prestressed concrete precast beam " middle mud jacking of stipulating must carry out in 48 hours after whole stretch-draw is finished when construction temperature is low in the winter time.

China Patent No. is that 201120540041.1 utility model patent discloses a kind of " pumping of prostressed duct anchor head sealing device ", this utility model is utilized the whole parcel of seal closure ground tackle, make seal closure and anchor plate close contact realize sealing, the deficiency of this design is must clear up the contact surface of anchor plate and seal closure first before the mud jacking, and anchor plate all builds pre-buriedly to enter with the beam body, top concrete is more, clear up loaded down with trivial details, if do not clear up, will produce spillage, and anchor plate all is cast iron materials, surface finish is not high, trachoma is more, also can cause obturation effect not good; In addition, this design and installation dismounting is also inconvenient, and is fragile in the use procedure; And this scheme also can't reach the requirement that " the provisional technical condition of Line for Passenger Transportation prestressed concrete precast beam " middle mud jacking of stipulating must carry out in 48 hours after whole stretch-draw is finished when construction temperature is low in the winter time.

Summary of the invention

The applicant is through constantly studying and Continual Improvement, a kind of new technical scheme has been proposed, it is higher that its purpose is to solve in the prior art cost, and waste material and man-hour and installing/dismounting be inconvenient, be difficult to realize covering the technological difficulties of pressing when construction temperature is low in the winter time.

The utility model provides a kind of i.e. pressure that can realize namely covering, and mounting or dismounting are convenient, the better mud jacking sealing device of sealing effectiveness, and the utility model is achieved in that

A kind of mud jacking sealing device, comprise gland, gland, ground tackle, screw rod and elastic washer, it is characterized in that, described gland is provided with the groove that is complementary with the gland external diameter, gland is withheld in the gland upper end by groove, and the upper surface at ground tackle is withheld in described gland lower end, is furnished with screw hole on the described gland, described screw rod passes screw hole and anchor plate spins, between described gland and the gland, be equipped with elastic washer between described gland and the ground tackle.

Further, described gland lower end edge ground tackle profile is provided with a recess, and described recess is withheld at the ground tackle upper surface.

The utility model is better than cement mortar shutoff of sealing effectiveness compared with prior art, and the squeezing pressure that can bear is large; Need not grout off and can realize namely covering namely and to press, even in winter of cold also needed wait time not, shortened the production cycle; Installation or removal are very easy, avoided in the unloading process the damage of equipment, and are reusable; The recess of gland lower end and ground tackle form buckle structure, avoid displacement occurring in fastening and pressure process are installed, and effectively protect elastic washer; Conventional method waste material, man-hour, the shortcoming that cost is higher has also obtained solution.

Description of drawings

Fig. 1 is that the utility model uses the status architecture schematic diagram;

Fig. 2 is the utility model gland structure schematic diagram;

Wherein: 1 is gland; 2 is gland; 3 is ground tackle; 4 is screw rod; 5 is elastic washer; 6 is anchor plate; 7 is presstressed reinforcing steel; 8 is screw hole; 9 is groove.

The specific embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated; Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.

Embodiment: with reference to Fig. 1, Fig. 2, the utility model discloses a kind of mud jacking sealing device, comprise gland 1, gland 2, ground tackle 3, screw rod 4 and elastic washer 5, it is characterized in that, described gland 2 is provided with the groove 9 that is complementary with gland 1 external diameter, gland 2 is withheld in gland 1 upper end by groove 9, the upper surface at ground tackle 3 is withheld in described gland 1 lower end, is furnished with screw hole 8 on the described gland 2, described screw hole 8 is identical with preformed hole diameter on the anchor plate 6, described screw rod 4 passes screw hole 8 and spins with anchor plate 6, fastening by 2 realizations of screw head drive gland by tightening screw rod 4, between described gland 2 and the gland 1, be equipped with elastic washer 5 between described gland 1 and the ground tackle 3.

Further, described gland 1 lower end edge ground tackle 3 profiles are provided with a recess, and described recess is withheld the upper surface at ground tackle 3, and gland 1 outer rim prevents displacement and protects elastic washer 5 along ground tackle 3 profiles chucking.

In " the provisional technical condition of Line for Passenger Transportation prestressed concrete precast beam ", regulation is arranged, mud jacking preceding pipeline vacuum should be stabilized in-0.06～-0.10MPa between, after slurry is filled with pipeline, should under 0.50～0.60MPa, hold and press 2min; For satisfying performance requirement, adopt rigidity gland 1 to add elastic washer 5 in the utility model and realize sealing, then undertaken fastening fixing by gland 2.

Ground tackle 3 described in the utility model is permanent anchor device used in the prestressed concrete, is in post stretching structure or member, is delivered to the anchoring instrument of inside concrete for the pulling force of maintenance presstressed reinforcing steel 7 and with it; Gland 1 upper end described in the utility model is the part near gland 2, part near ground tackle 3 is gland 1 lower end, described gland 1 can consist of separately the seal closure structure, it is the sealing casting of gland 1 upper end, also can consist of the seal closure structure with gland 2 combinations by gland 1, namely gland 1 upper end is hollow; Gland 1 consists of the seal closure structure with gland 2 combinations in the present embodiment, the upper surface at ground tackle 3 is withheld in gland 1 lower end, because ground tackle 3 is installed after being, ground tackle 3 external surfaces are very smooth, thereby can guarantee gland 1 and ground tackle 3 close contacts, gland 2 withheld in gland 1 upper end again, fastening by screw rod 4, form hermetically-sealed construction, between described gland 2 and the gland 1, be equipped with elastic washer 5 between described gland 1 and the ground tackle 3, further guaranteed sealing effectiveness; The recess of gland 1 lower end and ground tackle 3 form buckle structure, avoid displacement occurring in fastening and pressure process are installed, and effectively protect elastic washer 5.

Claims

1. mud jacking sealing device, comprise gland, gland, ground tackle, screw rod and elastic washer, it is characterized in that, described gland is provided with the groove that is complementary with the gland external diameter, gland is withheld in the gland upper end by groove, and the upper surface at ground tackle is withheld in described gland lower end, is furnished with screw hole on the described gland, described screw rod passes screw hole and anchor plate spins, between described gland and the gland, be equipped with elastic washer between described gland and the ground tackle.

2. a kind of mud jacking sealing device according to claim 1 is characterized in that, described gland lower end edge ground tackle profile is provided with a recess, and described recess is withheld at the ground tackle upper surface.