5 results about "Fortification" patented technology

The proposed technical solution relates to military defense structures, and more specifically, to military fortification structures used for engineering the positions of troops, checkpoints, guard outposts, border areas, and other critical facilities to ensure their effective protection and defense. A defensive fire structure comprises a body (1) assembled from blocks (2) with a cross-sectional shape corresponding to sector of a ring. The outer arc surface (3) of blocks (2) is bounded by a broken line, and congruent surfaces of blocks have cruciform projections (4) and cruciform recesses (5). At least three of said blocks (2) have through openings (6) of a stepped shape, which serve as embrasures. The defensive fire structure has a roof (7) made of elements shaped as sectors (8, 9) of a circle. Chords of sectors (8) of a circle located above the through openings (6) have length extended compared to the chord length of the other sectors (9) of the roof (7) circle. Sectors (9) of the roof (7) circle with the shorter chords rest on flat sections (12) of deflectors (10) mounted on both sides of the blocks (2) with through openings (6).

According to the method for calculating the fortified length of the cross section expanded section of the strike-slip fault tunnel and the related equipment provided by the invention, through fitting processing of the axes of the tunnels on the two sides after fault dislocation, accurate quantitative characterization of the axis form after dislocation is realized, and basic data support fitting an actual engineering scene is provided for fortified length calculation. The section expanding sections are symmetrically arranged in an extending mode with the section face as the center, full-coverage protection of a fault dislocation influence area is guaranteed, and the problem that local protection is lost possibly due to single-side fortification is avoided. The calculation logic combining the axis fitting and the clearance requirement breaks through the limitation that an existing engineering category method depends on experience judgment, quantitative calculation of the fortification length is achieved, it is guaranteed that the anti-dislocation performance of the tunnel meets the clearance requirement, construction cost waste caused by the too large fortification length can be avoided, and the method is suitable for popularization and application. And a foundation is laid for smooth fitting of a post-earthquake tunnel axis and rapid recovery of functions.

The utility model discloses a chute plug-and-play folding cat hole, which relates to the technical field of military fortifications and comprises a plug-in composite floor board, a plug-in composite integrated wall board, a connecting steel sheet, a composite integrated blocking baffle and an entrance protective door, and limiting chutes are parallelly arranged on long edges of two opposite sides of the upper end of the plug-in composite floor board. The two plug-in type composite integrated wallboards are horizontally and slidably inserted into the two limiting sliding grooves respectively, the connecting steel sheet is fixed between the tops of the two plug-in type composite integrated wallboards, and the composite integrated plugging baffle is plugged between the wide edge of one side of the plug-in composite floor board and the two plug-in type composite integrated wallboards. One end of the entrance protective door is vertically inserted into the side end of one plug-in type composite integrated wallboard and can horizontally rotate, the other end of the entrance protective door is movably inserted into the other plug-in type composite integrated wallboard, and an observation opening is formed in the middle of the entrance protective door. The detachable assembly type structure is adopted, so that quick disassembly, assembly, transportation and transfer are facilitated.

FIELD: military construction.SUBSTANCE: invention relates to small capital fortification structures for protecting people and equipment from small arms and shrapnel. The permanent fire point includes four monolithic reinforced concrete walls that form a rectangular hollow structure and a roof slab. The walls are connected to each other and to the roof slab using mounting embedded parts. Three walls comprise loopholes, and the fourth wall comprises an armoured entrance door. The walls have a two-layer reinforcement on the inside and outside with welded reinforcement meshes, which are meshes connected in pairs and turned towards each other, located vertically and offset by 0.5 steps relative to each other. Between the inner and outer sides of the wall reinforcement there is a shortened additional mesh, which is connected to the outer side of the wall reinforcement by a flat frame. The inner and outer sides of the wall reinforcement are also connected to each other by a flat frame. The roof slab has a similar two-layer reinforcement with welded reinforcement mesh on the outside. The first and second layers are meshes connected in pairs and facing each other, located horizontally. On the inside, at the bottom of the lid, the third layer is made in a single layer. The first and second layers are connected to each other by vertical flat frames. The walls and roof slab are made of concrete of at least class B 60 with the addition of fiber.EFFECT: increased strength, durability and reliability through enhanced reinforcement of the structure.17 cl, 6 dwg

The invention belongs to the technical field of tunnel and underground engineering construction safety protection, and discloses a gas tunnel grading fortification and comprehensive guarantee method which comprises the steps that gas content w, gas pressure P, surrounding rock gas permeability and geological stress data are collected before construction; establishing a grading rule according to the parameters and generating a risk partition map in combination with the tunnel section, wherein the map is updated once every 50-100m along with construction; in the construction stage, elimination-rotation-release-sealing fortification is carried out according to subareas, pre-pumping, channel guiding and discharging, three-level ventilation and composite seepage prevention and grouting isolation are carried out in a high-risk area, and spraying and grouting with different thicknesses are adopted in a medium-risk area and a low-risk area respectively; setting multiple parameter thresholds of concentration, flow and pressure in coal uncovering operation, and triggering emergency ventilation, extraction and plugging; in the operation stage, a double-layer anti-seepage system composed of a PVC coiled material and a grouting isolation belt is constructed, and grout is supplemented regularly; data are obtained through a monitoring system composed of a gas sensor, a stress meter and a displacement meter.