31results about How to "Limit lateral deformation" patented technology

The invention discloses a gob-side entry retaining concrete filled wall annular air bag construction method. The construction method adopts an annular air bag pressure bag mode, and an annular air bag pressure bag is fixed through anti-displacement anchorage devices and horizontal lateral confinement reinforcement devices. The anti-displacement anchorage devices make annular air bag formworks and top and bottom plates integrated to form a whole. The horizontal lateral confinement reinforcement devices can effectively limit transverse deformation of a filled wall body, ensure successive gob-side entry retaining, can resist multiple times of pressure from the top plate and improve the overall stability of the concrete wall body. Before concrete is cast into a filling cavity, inflation is needed, the annular air bag pressure bag structure bear rigid and flexible formwork supports for usage. After the annular air bag pressure bag is deflated, the bag is filled with concrete, the bag and the concrete jointly form a gob-side entry retaining lateral filled wall, the links of steel formwork erection and steel formwork dismounting are omitted in the whole process, a middle grouting process is not needed to be waited, the labor intensity of workers is reduced, continuous and rapid filling operation is achieved, and the face advancing speed can be improved.

The present invention disclosed a construction method of the soft base of comprehensive application piles and vertical geomorphous materials, and introduced the construction process in detail.The implantation position of geomorphology materials is marked with the location of the material; 2) Pile construction setting set setting in the step 1) is performed;Materials and pile connection; 5) The construction of the cushion and the embankment is performed.The invention implants vertical geographical materials in the ground base so that the vertical geographical materials and piles work together. On the basis of the vertical sinking of the ground soil, the vertical geomorphous material is achieved.Further improve the effect of foundation treatment.

The invention discloses a method for constructing a high-pressure mud retaining wall for forming a groove into an underground continuous wall, comprising the following steps: forming a guide wall; installing a groove milling machine; ; until the entire groove section is grooved. The advantages of the invention are that it can control the pressure of the mud in the groove, and use the sealing device of the groove and the hydraulic pump to realize the high-pressure retaining wall of the mud during the forming of the groove, so as to limit the lateral deformation of the soil body of the groove wall, thereby reducing the construction of the underground continuous wall. The construction cost of milling into the groove is simple and efficient; the sealing reliability of both ends of the telescopic sealing sleeve is high, which further improves the reliability of the high-pressure protective wall.

The invention belongs to the field of subgrade engineering, and relates to an EPS light embankment structure supported by reinforced gravel piles in soft soil areas and a construction method, including two-way reinforced gravel piles, drainage ditch, geotextile cushion, high-strength load transfer platform, waterproof Coiled material, edge-wrapped soil, EPS foam block, pavement structure layer; two-way reinforced gravel piles are arranged in groups of piles, distributed in a square, and longitudinally arranged in soft soil foundation; the top of two-way reinforced gravel piles is laid sequentially from bottom to top Geotextile cushion, high-strength load transfer platform, waterproof membrane and the second layer of high-strength load transfer platform are filled with EPS foam blocks in layers, and finally the pavement structure layer is laid. The invention improves the strength of the foundation, uses the EPS foam block as the embankment filler, significantly reduces the self-weight of the embankment and the overlying load of the foundation soil, and significantly enhances the overall stability of the structure through the high-strength load transfer platform, which can effectively solve the problem of soft The embankment built on the soil foundation has the disadvantages of large foundation settlement and poor stability.

The invention discloses a flexible formwork for gob-side retaining with double-stretched fibers, which comprises a main formwork connected with a top formwork, and the main formwork is provided with pouring ports, anchor bolt holes, transverse flanges and vertical wings. There is a sleeve connected to the transverse flange, and a reinforcement hole is provided on the top formwork, and a plurality of transverse ties and oblique ties are arranged in the main formwork, and both ends of the transverse ties are fixed to the main body by reinforcing rings. On the two opposite sides of the formwork, the two ends of the diagonal stays are obliquely fixed on the two connected surfaces inside the main formwork through the reinforcement ring. The main formwork is also provided with reserved holes, which are flexible molds. The cloth is prefabricated into a tubular structure. The template can limit the lateral deformation of the flexible template after filling, so that the flexible template is evenly stressed during filling, and the filling body has high strength and strong crack resistance. The invention discloses a method for soft-formed concrete construction by adopting cross-inclined double-stretched fiber flexible formwork in gob-side entry retention. The method is convenient for pipeline installation and fast in construction speed.

The invention relates to a method for industrially manufacturing embankment components and quickly constructing an embankment, which belongs to embankment construction technology. The joint preloading of plastic drainage boards, geotextiles, sand cushions and vacuuming is used to quickly treat the foundation; vacuuming is used under the sealing film, and a secondary sand cushion is thrown on the covering film, and the prefabricated components Input the earthwork from above; form the joint preloading of water level, sand cushion earthwork pile-up and vacuum; adopt the prefabricated embankment components to be placed on the treated embankment foundation, and connect each other to form the embankment skeleton, light cushion method, adjust The force balance of the embankment is improved, and uneven settlement and landslides are avoided; the problems of foundation strength and earthwork height are fundamentally solved, which is conducive to mechanized and large-scale construction. It also has the characteristics of replacing stone with soil, saving costs, increasing construction speed, and being stable and reliable.

The invention discloses a device for testing material creep under the coupling action of tensile stress and the environment. The device comprises a support, a weight, a heating jacket, a container containing a saturated inorganic salt solution, a strain demodulator, a power supply, a temperature controller, a strain sensor and a test piece, wherein the support comprises a positioning plate, an upper spherical hinge, an upper clamping head, a supporting rod, a bearing plate, a base plate, a lower clamping head and a lower spherical hinge; the supporting rod is connected with the bearing plate through a sliding bearing; the test piece is embedded in a groove in the upper clamping head and a groove in the lower clamping head; the weight is positioned on the bearing plate; the heating jacket covers on the outer side of the support; the container is positioned between the support and the heating jacket; the strain sensor is adhered to the outer wall surface of the test piece; and the temperature controller is connected with the ring-shaped heating jacket. By adopting the device, the reliability of the test process can be improved, and the accuracy of results is ensured. Meanwhile, the invention also discloses a test method for the test device. The method is simple and easy to operate, and can keep that the test piece does not generate stress relaxation in the process of long-term load application, and the stress is uniformly distributed.

The invention provides a connection joint of a concrete column and a steel beam, belongs to the technical field of construction engineering, and solves the technical problems of low strength, construction difficulty and the like of an existing connection joint of the concrete column and the steel beam. The connection joint of the concrete column and the steel beam comprises the concrete column, the steel beam, a half steel sleeve I and a half steel sleeve II. The half steel sleeve I and the half steel sleeve II are detachably connected and can be sleeved on the concrete column after being connected; the half steel sleeve I or the half steel sleeve II is fixedly connected with a connection arm which is detachably connected with the steel beam; and the concrete column is provided with a projecting shoulder, and the half steel sleeve I and the half steel sleeve II can abut against the projecting shoulder. The connection joint of the concrete column and the steel beam has the advantage of being high in bearing capacity and simple in construction.

The invention discloses a method for improving the performance of striped coal pillars by using grouting combined support bolts, relates to the technical field of strip coal pillar mining, designs the structure of grouting combined support bolts, and uses grouting combined support The method of improving the performance of the strip coal pillar by the protective bolt realizes the dual functions of grouting in the yield zone of the strip coal pillar and bolt support in the yield zone and elastic zone of the strip coal pillar. On the one hand, the bearing capacity of the yield zone is improved, and on the other hand On the one hand, the grouting combined with the supporting bolts gives the coal pillar a certain lateral restraint force, and the coal pillar is transformed from a two-way stress state to a three-way stress state, and the strength and performance of the coal pillar are improved; The top and bottom of the grouting combined support bolts are obliquely drilled. After grouting, the coal pillar is connected with the roof and the floor as a whole, which limits the lateral deformation of the coal pillar. The structure of the grouting combined support bolt is simple and can be The column width adjusts the length of the hollow grouting bolt body, which is easy to install, ensures the improvement of the bearing capacity in the yield zone, and is low in cost. It is suitable for large-scale promotion and application in mining areas.