3results about How to "Even grouting" patented technology

This invention provides a grouting device and a construction method for cast-in-place piles, belonging to the technical field of grouting devices. The device includes an outer grouting pipe and an inner grouting pipe: the outer and inner grouting pipes are coaxially arranged, with a pre-embedded part at one end of the outer grouting pipe, including a pipe head, a protective pipe, and a breakable component; the inner grouting pipe has multiple sets of second grout outlets at one end near the pre-embedded part, the pipe head is installed on the inner grouting pipe, and the two ends of the protective pipe are respectively sleeved on the inner grouting pipe and the pipe head, covering the second grout outlets for sealing and preventing blockage during pre-embedding; a first grouting cavity is formed between the outer and inner grouting pipes, and a second grouting cavity is formed inside the inner grouting pipe; multiple sets of first grout outlets are opened on the side wall of the outer grouting pipe; a grouting end cap is installed on the outer grouting pipe, with a detachable first plug and a second plug inside the grouting end cap, and a grouting port is opened on the grouting end cap; this improves the stability and reliability of the device during grouting construction and avoids rework due to channel blockage.

The utility model discloses an auxiliary tool for masonry mortar paving, which belongs to the technical field of auxiliary tools for mortar paving and is characterized in that an auxiliary tool body for mortar paving comprises a first side plate and a second side plate which are symmetrically arranged, a support plate and a baffle plate are fixedly connected between the first side plate and the second side plate, and a storage tank is encircled among the first side plate, the second side plate, the support plate and the baffle plate; according to the masonry slurry paving auxiliary tool, through the arrangement of the supporting plate, the flow guide face, the storage groove and the baffle, slurry can be directly added into the storage groove, uniform slurry paving is conducted when the slurry paving auxiliary tool body moves along a masonry, the slurry paving effect is good, and the slurry paving effect is good. And through the arrangement of the bottom plate, the balls and the guide grooves, the auxiliary tool body for slurry laying can be directly placed on the masonry conveniently, movement is easy, labor is saved, and the labor intensity of constructors is reduced.

The present application relates to the field of coal mine filling mining, in particular to a coal gangue slurry overburden balanced grouting filling method for pre-fracturing hard rock stratum, a plurality of first fracturing cracks along the strike are fractured in the thick hard rock stratum along the inclination at intervals, the inclination construction range of the first fracturing cracks is between the intersection of the caving line and the grouting horizon and the inclination boundary of the coal mining face, a plurality of second fracturing cracks along the inclination are fractured in the thick hard rock stratum along the strike at intervals, the range of the second fracturing cracks along the inclination is between the inclination boundary of the coal mining face, and the fracturing cracks do not exceed the top boundary of the thick hard rock stratum, and a certain thickness of buffer zone is reserved. Thus, the strike breaking position and the inclination breaking position of the thick hard rock stratum are controlled, and then the control of the separation of the grouting horizon is realized, and balanced grouting is realized. The present application can best weaken the thick hard rock stratum on the basis of reducing the hydraulic fracturing engineering quantity as much as possible to be suitable for the overburden separation grouting filling engineering.