42results about How to "Small hole diameter" patented technology

The invention relates to a method for treating landslide projects through combining a chemical electroosmosis method with micro anti-slide piles. The method comprises the following steps of: arranging metal electrodes and pouring different chemical solutions in boreholes and forming electroosmosis and chemical reaction under the action of a direct current field so as to enhance the shear strengthof potential failure surfaces of sliding zones; and then casting concrete in the boreholes and forming a micro reinforced concrete anti-slide pile system so as to provide a slide-resisting force. Themethod for treating the landslide projects through combining the chemical electroosmosis method with the micro anti-slide piles has the advantages and effects that: through carrying out electroosmosis reinforcement on the soft soil layers of potential landslide zones by using the chemical electroosmosis method, the coefficient of the shear strength of the potential landslide zones is remarkably increased, and the processing cost for the anti-slide piles or other treatment methods is effectively reduced; the bore diameter of the boreholes required by the micro anti-slide piles is small and themicro anti-slide piles are formed in identical boreholes to those for the chemical electroosmosis method through sequentially constructing, thus the difficulty and the cost for boring are low; and the shear strength and the slide-resisting force for landslide sliding zones are effectively enhanced. The method provided by the invention has the characteristics of simple construction technology, strong operability, convenience for quality control, obvious economic benefit and remarkable effect for treating landslides.

The invention provides a hole forming process of a hole bottom chambering device of an anchoring hole. The hole forming process comprises the following steps: the straight anchoring hole is struck; awater injecting guiding pipe (2) and a water pumping guiding pipe (3) are fixed into a rotary sleeve (1) through a fixing support (7), the bottoms of the water injecting guiding pipe (2) and the waterpumping guiding pipe (3) are made to stretch out of the rotary sleeve (1), and then the rotary sleeve (1) is placed into the straight anchoring hole; the water injecting guiding pipe (2) communicateswith an external high-pressure water pipe, and the water pumping guiding pipe (3) communicates with an external high-pressure water pump; the inner wall of the hole bottom of the anchoring hole is subjected to flow jet cutting through the water injecting guiding pipe (2), and meanwhile, the high-pressure water pump is adopted to pump mud at the hole bottom through the water pumping guiding pipe (3); after high-pressure flow jet hole cutting is completed, the high-pressure water pump is kept to continuously pump the mud at the hole bottom through the water pumping guiding pipe (3), and pumpingis stopped till the cement mud discharging amount of the high-pressure water pump is decreased; and the height of the water injecting guiding pipe (2) is adjusted to adjust the angle of a rotatable support (6), and the whole rotary sleeve (1) is taken out.

The invention relates to the field of potential dame risk detection, and particularly relates to a hardened dam potential risk detection method and device applying the parallel electrical survey. The device comprises an electrode for an electrical prospecting apparatus, wherein the frame inside the electrode comprises a copper bar and a transfusion duct; conductive sponge and conductive lint sequentially coat the outer part of the middle part of the electrode. The method and the device have the advantages of convenience in field operation, flexibility in operation, low labor intensity and wide application environment since a charging mode electric hammer is adopted to drill the surface of hardened dam; the drilling hole has a small diameter, so that the work for repairing the hardened surface layer of the dam in later phase can be facilitated.

The invention discloses a high slope earthwork and support engineering construction method which comprises the following steps of: carrying out construction measurement, pay-off and positioning; clearing and excavating a temporary drainage ditch; excavating a first layer of earthwork of a current-class slope; finishing a side slope of the current-class slope; drilling on the current-class slope according to a preset anchor cable installation position to form an anchor cable mounting hole; manufacturing and installing an anchor cable on the current-class slope; grouting the anchor cable mounting hole on the current-class slope; excavating a lower layer of earthwork of the current-class slope; constructing a waist rail on the current-class slope; carrying out prestressed anchor cable tensioning and locking on the current-class slope; sealing and anchoring the current-class slope; repeating the construction step of the current-class slope and completing the construction of a subsequent-class slope; and monitoring the side slope. Due to the adoption of the high slope earthwork and support engineering construction method disclosed by the invention, the high slope earthwork and support engineering construction method capable of effectively ensuring the stability of the side slope after the side slope is excavated is implemented. The high slope earthwork and support engineering construction method has the characteristics that after construction, a rock-soil body has stable structure; the process is simple and convenient; the high slope earthwork and support engineering construction method is safe to construct; the investment of large-scale mechanical equipment is reduced; and the cost is saved.

The invention discloses a detecting device for embedding depth of an anti-seepage membrane of a dam and a method for using it. The electrode and the resistivity measuring instrument, the measuring electrode and the resistivity measuring instrument are connected to the control display through the No. 1 wire in the probe rod. Slowly insert the fixing device into the drilled hole on one side of the anti-seepage membrane, and observe the change of current density with depth on the control display. When the current density peaks, read the scale value of the probe shaft corresponding to the peak current density , which is the embedding depth of the anti-seepage membrane. The invention utilizes the feature that the current density at the bottom of the anti-seepage membrane will have a peak value after the embankment soil is energized to detect, and the measurement result has high accuracy, and the device has a small hole diameter on the embankment, and the embankment itself The damage is small.

The invention provides a silencing device used for a transformer cooler draught fan. The silencing device comprises a silencing wind tunnel, a first silencing component, a second silencing component and a silencing material. The first silencing component is arranged in the silencing wind tunnel, the second silencing component is arranged in the first silencing component, windward parts of the first silencing component and the second silencing component form a taper structure, each of the first silencing component and the second silencing component is provided with several micropores and is filled with the silencing material. According to the invention, two layers of silencing components being of taper structures are arranged creatively, the silencing wind tunnel is arranged on the periphery of the silencing components, micropores are formed in the sidewalls of the silencing components, the silencing components are filled with silencing cotton, a prevention-type structure capable of reducing high-intermediate frequency noise and a resistance-type structure capable of reducing intermediate-low frequency noise are formed, the silencing frequency band is widened, the pressure loss is reduced, air flow regeneration noise is reduced, and a good silencing effect is achieved.