The invention relates to the technical field of soil quality detection. The invention further discloses a foundation soil quality classified detection sampling device before building engineering construction. The foundation soil texture classified detection sampling device comprises a sampler, wherein the interior of the sampler is movably connected with a fixed rod; the top part of the fixed rodis fixedly connected with a rotating wrench; fixed teeth are fixedly arranged in the sampler; a dragging handle is fixedly connected to the right side of the sampler; an air pressure chamber is movably connected to the lower portion of the fixed teeth; a sampling shovel is connected to the end, away from the rotating wrench, of the fixed rod in a specified mode; and a sample discharging plate is movably connected to the interior of the sampling shovel. When a movable sliding block moves to the outermost end of a movable rail, the movable sliding block is clamped into a clamping groove at the tail end of the movable rail, and supporting feet support the sampler due to the gravity action of the sampler, so that the sampler can be fixedly arranged in the sampling process, the sampler cannot be damaged in the sampling process and the waste of resources is reduced.

Foundation soil quality classified detection sampling device before building engineering construction

The invention provides an exploration sampling device of an ecological geological environment of the surface mine. The device comprises a driver, an exploration drilling rod, a speed transmission, anannular drilling saw, an upper frame plate, a lower frame plate and lifters. The driver is mounted on the upper frame plate; the four ends of the upper frame plate are connected with the four ends ofthe lower frame plate through the lifters respectively; and the driver is in transmission connection with the exploration drilling rod. The upper end of the exploration drilling rod is rotationally connected to the upper frame plate; the exploration drilling rod is in transmission connection with the speed transmission; the speed transmission is connected to the upper frame plate; and the speed transmission is in transmission connection with the annular drilling saw. The annular drilling saw is fixedly connected to the upper frame plate; and the exploration drilling rod is arranged in the middle of the annular drilling saw. Therefore, the soil can be extracted from the ground in a soil column manner; and thus the integrity of the soil sample is kept.

Exploration sampling device of ecological geological environment of surface mine

The invention provides an air-push multi-sampling cylinder portable rock-soil sampling device. The air-push multi-sampling cylinder portable rock-soil sampling device comprises power equipment, transmission equipment, a sampling root drilling rod and a high-pressure air tank, wherein the power equipment is connected with the transmission equipment, a lower end of the transmission equipment is connected with the sampling root drilling rod, at least two sampling cylinders are arranged in the sampling root drilling rod and are arranged in upward-downward way, an air pressure pad is arranged in the sampling root drilling rod and props against an upper part of the uppermost sampling cylinder, a lower end of the sampling root drilling rod is connected with a drilling head, a gap between an innerwall of the sampling root drilling rod and the sampling cylinders is a high-pressure air passage, the high-pressure air tank is arranged at one side of the power equipment and is used for outputtinga high-pressure gas, and the air pressure pad is used for pressing the sampling cylinders by an acting force of the high-pressure gas. The air-push multi-sampling cylinder portable rock-soil samplingdevice has the beneficial effects that regolith and muck attached onto the sampling cylinders are cleaned by the high-pressure gas, sampling soil layers in the sampling cylinders are not disturbed, and a favorable sample is provided for experiment of undisturbed soil; and moreover, graduation is arranged outside the sampling root drilling rod, and the depths of the sampling soil layers of the sampling cylinders can be accurately read.

Air-push multi-sampling cylinder portable rock-soil sampling device

The invention provides a method for reducing side friction of a pile foundation. The method comprises the following steps of: S1, a plurality of isolation pile casing sections are manufactured, and anasphalt coating is pasted on the inner wall of each isolation pile casing section; S2, all the isolation pile casing sections are sequentially connected in a welded mode to form an isolation pile casing, the isolation pile casing is placed in a pile hole, a gap exists between the outer wall of the isolation pile casing and the inner wall of the pile hole, and the pile hole is vertically formed, penetrates through the slope body of a side slope and extends downwards into a stable stratum; S3, a concrete fixing layer is poured on the part, located in the stable stratum, of the gap, a gravel filling layer is filled in the space, on the concrete fixing layer, in the gap, and a flexible material filling layer is filled on the gravel filling layer; and S4, steel reinforcement cage welding and aconcrete guide pipe are arranged at the upper end of the isolation pile casing, pile body concrete is poured into the isolation pile casing, and a pile foundation is formed. The method has the beneficial effects that the load borne by rock-soil mass on the upper portion of the side slope is reduced, the situation that the side slope is difficult to reinforce is avoided, and side slope instability, large deformation, collapse and other disasters are prevented.

Method for reducing side friction of pile foundation

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Air-push multi-sampling cylinder portable rock-soil sampling device

Method for reducing side friction of pile foundation