116results about How to "Reduce lateral deformation" patented technology

The invention discloses a liquefied soil foundation quake-proof road-bridge transition section structure of a ballastless track of a high-speed railway, and aims to improve the stability and the integrity of the roadbed at the transition section and meet the quake-proof design requirements of lines. The structure comprises a concrete bridge abutment (10) and a soil roadbed (20). A reinforced grading gravel transition section (30) is arranged between the concrete bridge abutment (10) and the soil roadbed (20), wherein the longitudinal section of the transition section is wedge-shaped and the transverse section of the transition section is right trapezoidal. Rows of reinforcing piles (50) are arranged in the liquefied soil foundation at intervals along the longitudinal and transverse directions under the transition section (30). The pile ends of the reinforcing piles (50) pass through the liquefied soil layer of the foundation and enter a non-liquefied soil layer. A cement grading gravel reinforced cushion layer (40) is paved between the foundation surface and the pile top of the reinforcing pile (50). A reinforced concrete lap plate (60) is arranged on the top surface of the reinforced grading gravel transition section (30). One end of the reinforced concrete lap plate (60) is simply supported or fixedly supported on the concrete bridge abutment (10), while the other end is placed on the soil roadbed (20).

This invention relates to an endless elastomeric traction band that is used to propel tracked vehicles [i.e., vehicles which use endless traction bands rather than tires to contact the terrain over which they are driven, e.g., tractors, tanks, bulldozers, etc.] and, more particularly, to the inner surface of such a traction band where lug reinforcements are inserted to laterally reinforce the guide lugs and minimize de-tracking occurrences.

The invention discloses a reinforced earth retaining wall model test apparatus and method. The apparatus includes: a model case (1), a retaining wall panel (5), filling materials (7), a vertical load loading system (10) and a testing system. The filling materials (7) are put inside the model case (1). The retaining wall panel (5) is arranged in front of the model case (1). The vertical load loading system (10) is arranged above the model case (1) and applies vertical pressure to a model. According to the invention, the filling materials (7) are made of mixed cast-steel shots which have a density between 5.2g/cm<3> to 7.0g/cm<3> and an internal friction angle between 28 DEG to 35 DEG. The density of the mixed cast-steel shots is 3-4 times greater than that of ordinary sand filling materials, and the internal friction angle of the mixed cast-steel shots is similar to that of ordinary sands. A stress field is made equivalent by increasing the density of the filling materials, so that the stress state of the filling materials of a retaining wall is made to be equivalent, and the stress and deformation characteristics of the model can be measured effectively. The filling materials can be used repeatedly for many times, which significantly reduces the cost of the testing.

The invention discloses an FRP pipe and thick-wall steel pipe compounding hollow recycled concrete pile which is mainly formed by an FRP pipe, a round reinforcement cage framework, a thick-wall steel pipe and recycled concrete. The round reinforcement cage framework and the thick-wall steel pipe are arranged in the FRP pipe, and the round reinforcement cage framework, the thick-wall steel pipe and the FRP pipe are arranged concentrically. The recycled concrete is poured in annular space between the FRP pipe and the thick-wall steel pipe. The bearing capacity and deformation resisting capacity of the single pile can be greatly improved through the built-in thick-wall steel pipe. The wrapping FRP pipe can effectively prevent a pile body from being corroded, and the durability of the pile body is improved. Meanwhile, the FRP pipe and spiral stirrups are combined to restrain the inner recycled concrete, and the bearing force of the compounding pile is further improved. Waste concrete is fully utilized as recycled aggregate, and application and popularization of the recycled concrete in building foundation engineering are facilitated. In a word, the compounding hollow recycled concrete pile has the advantages of being good in pile forming quality, high in bearing force, good in deformation resisting capacity and durability, small in influence on the environment, high in construction speed and the like.

The invention belongs to the technical field of civil engineering, and particularly relates to a device used in the rock and soil test for improving the testing accuracy of a micro earth pressure cell. The device includes a micro earth pressure cell, a sponge ring and a steel ring, wherein the micro earth pressure cell (1) is provided with a data line; a side notch of the steel ring is used for leading out and fixing the data line of the micro earth pressure cell (1); the sponge ring (2) is sleeved on the outer side surface of the micro earth pressure cell (1); the steel ring (3) is sleeved on the outer side surface of the sponge ring (2); and the micro earth pressure cell, the sponge ring and the steel ring are connected through a binder. The device solves the problem of inaccuracy in earth pressure measurement during the civil engineering construction process, and has the characteristics of high accuracy, simple operation and good economical efficiency.

The invention discloses a supporting structure of a foundation pit. The supporting structure comprises jet grouting piles and a double-row pile structure which is inserted in the jet grouting piles, wherein the jet grouting piles are high-strength cement-soil pile bodies formed on a soil body around the foundation pit, and the multiple jet grouting piles are in mutual lap joint to form a reinforcing region; the double-row pile structure comprises a first row of cast-in-place piles, a second row of cast-in-place piles and connecting beams, the connecting beams are connected with the tops of the first row of cast-in-place piles and the tops of the second row of cast-in-place piles, and the first row of cast-in-place piles, the second row of cast-in-place piles and the connecting beams are all of a reinforced concrete structure. According to the scheme, the supporting structure aims to brace the deep foundation pit under the complicated geological condition with rich water and soft soil and under the condition that complicated barriers cut through the upper portions of the foundation pit; when the barriers such as cables cut through the upper portion of the foundation pit, the intervals between the cast-in-place piles can be flexibly adjusted to avoid the barriers; the large-diameter high-pressure jet grouting piles are in mutual lap joint, can effectively stop water and can control horizontal displacement of the soil body outside the pit along with the double rows of cast-in-place piles; the supporting structure formed by the cast-in-place piles is constructed in the large-diameter jet grouting piles, and therefore construction sites outside the foundation pit are saved.

The invention relates to a self-resetting soft steel energy dissipating brace, which mainly consists of a brace component, a prestress device, an energy dissipating device and a plurality of fixed connecting components, wherein soft steel is connected with end plates through force transmission devices; one end of an inner sleeve is provided with a groove; a projected connecting plate can penetrate into the groove to be welded with the inner sleeve; an outer sleeve covers the inner sleeve; arc-shaped welding splicing plates are symmetrically welded on the outer surface of one end of the outer sleeve; the outwards extending part of each arc-shaped splicing plate is welded with a combined connecting plate; the end plates are positioned at two ends of the sleeves; resetting bars are arranged in the inner sleeve; and the two ends of the resetting bars are connected with the end plates through anchor devices. The self-resetting soft steel energy dissipating brace has the advantages that the soft steel is used to be stressed in the plane; greater initial rigidity is provided for a structure; the earthquake design level of no damage in minor earthquake is achieved; when medium or great earthquake occurs, the energy is dissipated through the plastic deformation of the soft steel; after the earthquake action stops, the soft steel is reset by using the recovery force of the resetting bars, so that the residue deformation of the structure is eliminated; and the earthquake design level of reparability after medium earthquake and falling prevention in great earthquake is achieved.

The invention discloses a construction method of a combined supporting and retaining structure, and relates to the technical field of civil construction. The method includes the steps of surveying and setting-out, mountain slope treatment, manufacturing of prefabricated reinforced concrete breast boards, foundation surface cleaning and replacement filling, construction of a cast-in-place concrete foundation, construction of a cantilever type structure, construction of pre-stressed anchor cables, masonry installation of the prefabricated reinforced concrete breast boards, and construction of a wrapped face reinforced soil structure and a covering layer. By using the vertical pre-stressed anchor cables, the workload can be reduced, the construction period can be shortened, the anti-overturning capacity and anti-slippage capacity of the combined supporting and retaining structure can be improved, and the overall stability and anti-lateral-deformation capacity of the whole combined supporting and retaining structure can be improved; by adopting the prefabricated reinforced concrete breast boards, the construction progress can be accelerated, and the project quality can be ensured; by using the wrapped face reinforced soil structure, the strength and integrity of a filling part can be improved, and the lateral soil pressure on the panel of the supporting and retaining structure can be reduced. By means of the method, the overall stability is improved, occupation of land is reduced, construction is simplified, and the construction cost is reduced; the method is especially suitable for roadbed construction in mountainous and hilly regions.

The invention discloses opposite pulling type anchor rods for a gob-side entrydriving small coal pillar and a support method thereof. A middle pull rod body of each opposite pulling type anchor rod is sleeved with two rubber pulp stopping valves in a spaced mode, and one of the rubber pulp stopping valves is provided with a pulp pouring hole; large deformation devices with the same structure, trays and nuts are symmetrically connected to the two ends of each middle pull rod body, and the trays and the nuts are matched with one another; each large deformation device comprises a sleeve, a high-strength compression spring, a fastening bolt and a connection piece, wherein one end of the sleeve is a seal bottom with a through hole, and the other end of the sleeve is an opening end; each opening end is in threaded connected with the corresponding connection piece, and each connection piece is in threaded connection with the corresponding middle pull rod body; and each high-strength compression spring is installed in the corresponding sleeve, and after each fastening bolt penetrates through the corresponding high-strength compression spring, the threaded head of the fastening bolt is exposed out of the corresponding sleeve seal bottom through hole. When the opposite pulling type anchor rods are used for supporting the small coal pillar, a support mode that the pulp is poured in the middle, and the two ends are pre-tightened is formed, large deformation of the coal pillar is adapted, and meanwhile the safety and stability of the coal pillar are ensured.

A wrapping type reinforcement solidification method for a roadbed of a high filled embankment is implemented as follows: solidified soil material making, concretely, the solidified soil material is made by uniformly stirring a soil curing agent and filler soil; reinforcement laying, concretely, reinforcements are horizontally crosswise arranged and completely paved on the surface of a lower bearing layer after being leveled in full width, a fixed geogrid is inspected and aligned while being pulled and paved forwards, and the reinforcements are flattened and straightened; solidified soil material paving, concretely, the solidified soil material is paved on the geogrid layer by layer, each layer is ground and formed after being paved uniformly, and grinding is conducted till the filling elevation of wrapping reinforcement solidified soil is reached; wrapping and reinforcement stretching, concretely, the reinforcements of the preserved reinforcement sections at the both sides are inflected upwards to wrap the outer side of the solidified soil material by certain length, and the inflected reinforcements at the both sides are connected by reinforcement stretching strips and paved longitudinally at an equal interval, to form a reinforced solidification wrapping body; and curing and molding, concretely, field soil covers or geomembrane caps the upper parts of the reinforced solidification wrapping bodies for 7-14 days for curing. According to the invention, the light reinforced structure with good deformation compatibility is provided, the dead-weight can be reduced, and thus the load borne by a foundation is effectively decreased.

The invention discloses a lock foot pile support structure for controlling tunnel initial support settlement convergence. The structure comprises an initial support in the tunnel grotto. A tilted lock foot pile is arranged at the outer wall of the initial support; the lock foot pile comprises a rotary jetting pile body, and the rotary jetting pile body is connected to an L-shaped steel core material. The other end of the L-shaped steel core material is connected with a connecting steel bar. The connecting steel bar is connected to an I beam steel frame of the initial support. The lock foot pile support structure for controlling the tunnel initial support settlement convergence has the advantages that the technical process is simple; the effected interference to the process conversion is less, the operation is convenient; the work efficiency is improved; the problems that the excavations of middle and lower steps cause the arch foot to be vacant, the side wall of the tunnel is unstable or the slippage and the grouting and anchorage effect of lock foot are poor are overcome; the stability of the palm surface, the deformation and settlement of the control cavern and the mechanized construction are achieved.

The invention discloses a carbon fiber board prestress tension clamp which comprises a clamping sleeve with a wedge-shaped through hole, a wedge-shaped clamping piece used for clamping a carbon fiber plate, a connecting plate detachably fixedly arranged at the big opening end of the wedge-shaped through hole, and a tension rod fixedly arranged on the connecting plate, wherein the wedge-shaped clamping piece is used for clamping the carbon fiber plate and then is wedged into the clamping sleeve to be matched with the wedge-shaped through hole. The carbon fiber board prestress tension clamp is characterized in that the wedge angle of the wedge-shaped clamping piece is more than that of the wedge-shaped through hole, which can lighten the stress concentration at the small end of the wedge-shaped clamping piece, is beneficial to transferring the tension force inside the clamp and prevents the carbon plate from being broken during the tesnion. The cylindrical clamping sleeve is adopted to ensure that the thickness of the clamping sleeve at the middle along the width direction of the wedge-shaped clamping piece is biggest, which can reduce the transverse deformation of the clamping sleeve, is beneficial to the uniform force of the carbon fiber plate in the width direction and prevents carbon fibers at the side of the carbon fiber plate from being broken, therefore, the clamp has better clamping property. A pre-ejecting and ejecting-retreating device is matched with the clamp, therefore, the prestress tension operation with high-quality and high speed and efficiency of the carbon fiber plate can be realized.

The invention discloses a nonlinear air spring. The nonlinear air spring comprises an upper cover plate, a support plate, air bags, an annular rubber pile and an abrasion plate; the support plate is coaxially arranged below the upper cover plate, upper and lower sub-openings are arranged at the air bags on the upper cover plate and the support plate, the annular rubber pile is coaxially bonded atthe bottom of the support plate, and the abrasion plate is fixed to the top surface of the support plate; the center position of the support plate is provided with a limiting projection that projectsdownwardly into an inner cavity of the annular rubber pile, the center position of a bottom plate of the annular rubber pile is provided with a limiting stop which protrudes upwards, the top surface of the limiting stop is a groove shape to form a limiting groove, the limiting protrusion extends into the limiting groove along the central axis and is not in contact with the limiting groove, the nonlinear air spring is characterized in that the limiting protrusion is sleeved with an elastic stop, and the elastic stop extends into the limiting groove and is not in contact with the limiting groove. The three-stage transverse nonlinear rigidity is realized, various line conditions are better adapted, and the safety requirement of a vehicle is guaranteed. The invention further provides a transverse rigidity design method of the nonlinear air spring.

The invention discloses a PVC pipe and thick wall steel tube composite hollow recycled concrete pile, which is mainly prepared from PVC pipes, a round reinforcement cage framework, thick wall steel tubes and recycled concrete, wherein the round reinforcement cage framework and the thick wall steel tubes are arranged in PVC pipes, and the three are concentrically arranged; recycled concrete is poured into the PVC pipes and the thick wall steel tubes; the built-in thick wall steel tubes are capable of improving single-pile bearing capacity and non-deformability by a large margin; the externally covered PVC pipes are capable of effectively preventing pile bodies from being corroded and improving pipe body durability; at the same time, the recycled concrete inside can be jointed restrained by the PVC pipes and spiral stirrups, thus further enhancing composite pile bearing capacity; and waste concrete can be used as recycled aggregate, thus being favor of popularization and application of recycled concrete in building foundation engineering. In short, the PVC pipe and thick wall steel tube composite hollow recycled concrete pile has the advantages of good pile formation quality, high bearing capability, good non-deformability, good durability, small environment influence, quick construction speed and the like.

The invention relates to a post-tensioned prestressing rectangular hollow foundation pit support pile. The support pile comprises a rectangular stabilizing ring rib, a rectangular steel reinforcement framework, concrete, a bottom pressure bearing plate and a locking anchorage device, wherein reinforcing steel bars are respectively arranged on a rectangular steel reinforcement framework inner side which is close to a foundation pit and the two adjacent sides of the rectangular steel reinforcement framework, an isolation pipe is arranged outside the foundation pit, a steel strand or a high tensile reinforcing steel bar is arranged in the isolation pipe, a reinforcement stirrup is used to fix the reinforcing steel bar and the isolation pipe to form a rectangular framework structure, the pressure bearing plate is arranged on the bottom end of the pile of the isolation pipe, the pile bottom pressure bearing plate is fixedly connected with one end of the steel strand or the high tensile reinforcing steel bar, the steel strand or the high tensile reinforcing steel bar penetrates through the isolation pipe, the locking anchorage device is used to lock a pile top, meanwhile, a grouting hole and a vent hole are formed in the locking anchorage device on the pile top, and the rectangular stabilizing ring rib is arranged in a rectangular hollow support pile. By the pile, a function in supporting the foundation pit is enhanced, the side deformation of a supporting structure and the adverse influence of the foundation pit to the periphery environment are reduced, the use amounts of the reinforcing steel bars and the concrete are reduced, and the building cost is saved.

The invention discloses a production technology of an oblique tooth-shaped edge-cut triangular belt. The production technology comprises viscose blending according to technical requirements, mixing, calendaring, reversing splicing, molding, oblique tooth-shaped rubber sleeve preparation, vulcanization, cutting and grinding. The base rubber layer is prepared from an oriented nylon fiber-rubber compound and a nylon fiber group is transversely and orientedly arranged in a triangular belt compressed layer so that the lateral rigidity and resistance to side pressure load of the triangular belt are obviously improved, the load is uniformly distributed on the whole strengthening layer and the dynamic mechanical properties of the triangular belt are improved. The oriented nylon fibers are added into the base rubber layer so that hardness and impact strength of the base rubber layer are improved. The oriented nylon fiber-rubber compound can effectively prevent early damage of the surface of the triangular belt, improve wear resistance, improve holding power between the triangular belt and a grooved wheel, reduce transmission noise and satisfy maintenance-free technical requirements.

The invention relates to a bending die. The bending die comprises a male die body and a female die body. Supporting shafts which are used for supporting and bending a copper bar and matched with the male die body are arranged on the female die body. A first guide face for preventing the side wall of the copper bar from deforming and a second guide face corresponding to the first guide face are arranged on the female die body. An ejecting mechanism for ejecting the copper bar from the portion between the first guide face and the second guide face is arranged between the first guide face and thesecond guide face. The ejecting mechanism comprises swinging arms which are arranged on the supporting shafts in a sleeving manner and can rotate around the supporting shafts. According to the die, the groove matched with the copper bar for positioning is formed in the female die body. When the copper bar is bent, the first guide face and the second guide face can support the side wall of the copper bar, longitudinal bending and deformation of the copper bar are reduced effectively, and the copper bar is ejected upwardly through the ejecting mechanism after the copper bar is bent, so that thecopper bar can be formed at a time, the production efficiency is improved, the quality of products is guaranteed, and the safety is improved as well.

The invention discloses a multi-cable compounded damping cable. The technical key point lies in that the multi-cable compounded damping cable comprises a main cable and at least one secondary cable distributed around the main cable, and the at least one secondary cable is located on the upper portion of the main cable. The lower ends of the main cable and the secondary cables are connected with a concrete anchor fixed to the ground. The upper end of the main cable is connected with an upper anchoring end stand column fixedly connected with a structure through a main cable shock absorption device. The upper ends of the secondary cables are connected with the upper anchoring end stand column fixedly connected with the structure through a secondary cable shock absorption device. Hanging rods are arranged between the main cable and each secondary cable as well as between the secondary cables. According to the multi-cable compounded damping cable, the multi-cable compounded damping cable can be installed between two structures which are at a long distance and move relatively, and has the energy dissipation and shock absorption effects basically equal to those of a damper installed between two structures very close to each other.

The invention discloses acid-resistant pipeline steel and a pipe making method, and relates to the field of steel and iron materials. The acid-resistant pipeline steel comprises the chemical compositions of, by mass, 0.014%-0.024% of C, 0.10%-0.35% of Si, 0.60%-0.80% of Mn, less than or equal to 0.012% of P, less than or equal to 0.0010% of S, 0.030%-0.070% of Nb, 0.006%-0.020% of Ti, 0.10%-0.30%of Ni, 1.00%-1.10% of Cr, 0.15%-0.20% of Mo, 0.10%-0.30% of Cu, 0.010% of V, 0.015%-0.050% of Al, and the balance Fe and impurities. According to the acid-resistant pipeline steel and the pipe makingmethod, unique composition design is adopted, pipe making is carried out through edge milling, prebending, forming, welding, flaw detection, hole enlargement and hydraulic testing and other processesto meet the pipe making requirements of the acid-resistant pipeline steel.

The invention discloses a shock absorber of an engine. Upper shock absorbing pads are arranged above a support plate, and lower shock absorbing pads are arranged below the support plate; each of the upper shock absorbing pads and the lower shock absorbing pads comprises a rubber block, plastic reinforcing plates and springs are embedded in the rubber block, and the springs penetrate the plastic reinforcing plates respectively; fixing holes are formed in the middle of the upper shock absorbing pads and the lower shock absorbing pads, through holes are formed in the support plate, and the upper shock absorbing pads and the lower shock absorbing pads are arranged on the support plate through fixing bolts; each fixing bolt penetrates the fixing hole of the corresponding upper shock absorbing pad, the corresponding through hole in the support plate and the fixing hole of the corresponding lower shock absorbing pad sequentially. By means of the plastic reinforcing plates, the strength and the stiffness of each shock absorbing pad are improved; besides, the plastic reinforcing plates are integrally connected by the springs, the strength and the stiffness of the shock absorbing pads are improved, and deformation of the shock absorbing pads is reduced; further, the energy storage effect of the springs is better, the rubber elasticity is better, and vibration isolation and better comfort can be guaranteed through combination of the springs and the rubber.

Bow having a centerpiece, two flexurally elastic limbs, a string, at least one string pulley, mounted in one end of a limb and intended for accommodating the string, and at least two cable pulleys, connected rigidly to the string pulley and intended for accommodating and guiding compensating cables, and in each case at least one cable pulley is arranged on both sides of the string pulley, and the subassembly made up of the string pulley and cable pulleys is mounted in a rotatable manner in each case, and at least one deflecting stop is present for the purpose of limiting the deflection of the string, and this deflecting stop, when the string is deflected, strikes against a limb or against a stop element connected rigidly to the limb.