50results about How to "Operational impact is small" patented technology

The invention discloses a method for reinforcing a cracked and damaged lining of an operation tunnel. An annular reinforcing structure is mainly formed by ribbing steel bars, anchor rods, a steel bar mesh and jetting concrete, and therefore the cracked and damaged lining is reinforced. The method is easy to implement, the lining of the tunnel can be prevented from being detached and changed on a large scale, the influence on tunnel operation is reduced to the maximum, the repairing construction method and technology are fast and rapid to conduct, the repairing time can be greatly shortened, and the construction process and structure safety can be ensured. Thus, by means of the structure, great economic benefits can be brought, and the method is particularly suitable for reinforcing of the lining of the operation tunnel.

The invention discloses a full-set dismantling and installing construction method of a bridge overpassing an existing line. Full-set dismantling and installing construction is conducted on a plurality of beam segments needing to be dismantled of a used beam to be dismantled from front to back. The full-set dismantling and installing construction method comprises the steps that firstly, a pavement layer of the bridge surface is milled; secondly, roof-propping is conducted on the beam segments; thirdly, preparatory work is conducted before hoisting; fourthly, hoisting and moving-out are conducted; fifthly, one beam segment is installed after replacement; sixthly, full-set dismantling and installing construction of the next beam segment is conducted, specifically, full-set dismantling and installing construction is conducted on the next beam segment needing to be dismantled of the used beam to be dismantled according to the first step to the fifth step of the method; and seventhly, the sixth step is repeated once or more than once till full-set dismantling and installing construction of all the beam segments needing to the dismantled in the used beam to be dismantled is completed. The method is simple in step, reasonable in design, easy and convenient to implement and good in using effect, full-set dismantling and installing construction of the bridge overpassing the existing line can be completed easily, conveniently and rapidly, the construction process is safe and reliable, the construction period is short, and the method is economical and practical.

The invention relates to a railway construction method of dismantling an existing girder bridge and pushing a frame structure in situ. The method of conducting pushing after removing beams is adopted for construction, the position for a beam containing platform is reserved when the frame structure is prefabricated, the upper line and the lower line of a railway line are simultaneously reinforced, beam moving is conducted on the upper line and the lower line independently in the beam moving process, substitute I-beams are used for supporting the railway line after beam bodies are removed, the substitute I-beams are dismantled one by one while pushing is conducted, beam removing is conducted through night skylight closing points, the beams on the lower line are removed at a time from the lower line side, the beams on the upper line are removed at a time from the upper line side, the skylight closing points are occupied once when the beams on the upper line are removed and once when the beams on the lower line are removed, and the skylight closing points are closed for three hours each time. When the construction method is used, the railway operation of each railway line only needs to be interrupted for a short period of time, the operation is convenient, the construction cost is low, and it can be ensured that the influences on the railway operation are reduced to the maximum degree.

The invention provides a small-curve-radius steel box girder bridge erecting machine and an erecting construction method. The bridge erecting machine comprises a bridge erecting machine main beam, a front supporting leg device arranged at the front end of the bridge erecting machine main beam, a rear supporting leg device arranged at the rear end of the bridge erecting machine main beam, a middlesupporting leg device arranged at the position, close to the rear end, of the bridge erecting machine main beam and a middle supporting leg transverse moving rail arranged in the transverse bridge direction, and the bottom of the middle supporting leg device is installed on the middle supporting leg transverse moving rail. And a front crown block 16 and a rear crown block 17 are arranged on the bridge girder erection machine main beam. When the middle supporting leg sliding block on the middle supporting leg transverse moving rail is moved; when the steel box girder is erected, the girder tailof the main girder of the bridge girder erection machine can move along with the main girder, the rotating angle of the bridge girder erection machine can be adjusted, the whole attitude of the bridge girder erection machine can be adjusted to the steel box girder erection attitude, the steel box girder erected by the bridge girder erection machine in the attitude is the set steel box girder attitude, and the method is suitable for erecting small-curve-radius steel box girders.

The invention provides a method for treating ballastless track subgrade elevation defects. The method comprises the following steps that S1, the positions and the types of track defects are acquired so as to determine the treatment range; S2, in the treatment range, an adjusting groove is formed below the supporting layer through an underground excavation mode; S3, a track is adjusted to a target elevation; and S4, filling is carried out on the adjusting groove so as to fill the adjusting groove, wherein in the step S2, the adjusting groove extends downwards from the bottom surface of the supporting layer in the vertical direction, the adjusting groove extends in the arrangement direction of the track in the longitudinal direction, and the two sides of the adjusting groove are located outside the corresponding side walls of the supporting layer correspondingly in the transverse direction. According to the method, the economical efficiency is good, and construction can be carried out on the skylight time.

The invention aims at providing a track detection device based on inertial measurement. The track detection device based on inertial measurement comprises an inertial measurement module; the inertialmeasurement module comprises a laser scanner, an adapter plate, a detection beam, laser range finders, connector interfaces, line boxes and an inertial navigation system, wherein the adapter plate isarranged on the detection beam; the laser scanner is arranged on the adapter plate; the laser range finders are arranged at the two ends of the detection beam; the inertial navigation system is arranged in the middle of the detection beam; the line boxes are arranged in the positions, on the detection beam, on the two sides of the inertial navigation system; and the connector interfaces are formedin the positions, on the detection beam, on the external sides of the line boxes. The track detection device based on inertial measurement has the advantages that the track detection device based oninertial measurement can be mounted on a running train and can also be mounted on a driving trolley to independently operate; and as a vehicle-mounted dynamic detection mode of the track detection device based on inertial measurement has small influences on normal operation, possesses high efficiency and high speed and really reflects the state of infrastructures under a train running condition, the vehicle-mounted dynamic detection mode of the track detection device based on inertial measurement can be used as one of main detection means of safety states of railway and urban rail transit infrastructures.

The invention provides a straddle type monorail vehicle control circuit and a straddle type monorail vehicle. The straddle type monorail vehicle control circuit comprises a first marshalling vehicle circuit, a second marshalling vehicle circuit and a power supply control circuit. The first marshalling vehicle circuit and the second marshalling vehicle circuit are two mutually independent high-voltage circuits; when one of the first marshalling vehicle circuit and the second marshalling vehicle circuit breaks down, disconnection of high voltage of the marshalling vehicle circuit which breaks down is controlled and achieved through the power supply control circuit, and the marshalling vehicle circuit which does not break down provides high voltage. Through the above scheme, the first marshalling vehicle circuit and the second marshalling vehicle circuit are two mutually independent high-voltage circuits. When one of the circuits breaks down, the circuit of the marshalling vehicle which breaks down can be isolated, the circuit of the marshalling vehicle which does not break down can still operate normally, self-rescue of the vehicle is achieved, more effective rescue capacity and a more flexible rescue mode are achieved, and vehicle rescue is completed in the mode that the influence on operation is minimum.

The invention discloses a construction method for replacing a disc type support with a rail transit plate type support. The construction method sequentially comprises a preparation stage, a first jacking stage, a padstone replacement stage and a second jacking stage. The preparation stage and the padstone replacement stage complete construction in a non-skylight point, and the first jacking stageand the second jacking stage complete construction in a skylight point; the first jacking stage and the second jacking stage each comprise the steps of upper constraint force relieving, overall jacking, upper constraint force recovering, data collecting after jacking and jacking system disassembling and maintaining; and in the first jacking stage, a plate type support is taken out during overall jacking, and in the second jacking stage, a disc type support is installed during overall jacking. According to the construction method, the support is replaced in the mode of ''not interrupting traffic, longitudinally dividing piers and transversely and synchronously jacking beam bodies'', train skylight points and non-skylight points are fully utilized for construction, and an influence on existing rail line operation is small.

The invention discloses a roadbed karst collapse comprehensive renovation method which comprises the following steps: 1, geology in a line range is explored, and karst development conditions are determined in combination with drilling coring and a pressurized-water test; 2, inclined holes and straight holes are drilled in the karst section, the inclined holes are formed in one row on each side ofthe line and obliquely drilled towards the center of the line, and the straight holes are formed in two rows on each side of the line and located in the outer sides of the inclined holes; 3, after drilling is completed, grouting pipes and grout return pipes are arranged for the inclined holes and the straight holes, and hole sealing is conducted; and 4, conducting pressure grouting on the inclinedholes and the straight holes. According to the method, soil cracks and karst caves under the roadbed surface are filled through inclined hole grouting, and roadbed surface collapse under the action of train loads is prevented; the problem of subgrade surface collapse caused by soil body fine material loss due to dynamic water change is solved through straight hole waterproof curtain grouting, thesubgrade karst treatment effect is remarkable, the construction cost is low, the period is short, and the influence on existing railway operation is small.

The invention relates to a method of transferring a contact suspension for additionally building an open-cut tunnel on an electrified railway operating line. The method includes the steps of: building a section of open-cut tunnel foundation and two pieces of sidewalls close to a to-be-dismantled contact network supporting column; then vertically arranging an arch-shaped steel pipe bracket between the two sidewalls; transferring a contact suspension on the contact network supporting column onto the steel pipe bracket; constructing a whole open-cut tunnel after dismantling the contact network supporting column; and finally transferring the contact suspension onto an arch buttress bracket and dismantling the steel pipe bracket, etc. In the method provided by the invention, the arch-shaped steel pipe bracket as the device for transferring the contact suspension is vertically arranged in the open-cut tunnel under construction, in this way, not only the contradiction occurred due to the traditional contact network supporting column occupying the building site of an open-cut tunnel can be solved, but also the time for locking out a railway line is shortened maximally, so that the influence on the normal operation of electric locomotives is minimum, and at the same time, the construction of an arch ring of the open-cut tunnel can be continued. In addition, the safety of constructors is guaranteed due to a grounding wire laid on the steel pipe bracket.

The invention discloses a demolition construction method for a bridge superstructure. The demolition construction method mainly comprises the steps of demolition preparation, construction safety enclosure, demolition of a bridge deck crash barrier, demolition of a bridge deck, demolition of a beam plate and site clearing, wherein the demolition of the beam plate comprises main span full-suspendedbeam demolition operation and semi-suspended beam and T beam demolition operation; and the main span full-suspended beam demolition operation and the semi-suspended beam and T beam demolition operation each comprise the steps of removing longitudinal and transverse connection, taking a beam, lowering the beam and transporting the beam. The demolition construction method is basically opposite to the installation process of a bridge, and is convenient to master and implement; and under the conditions that the construction boundary is limited and mechanical equipment and construction conditions do not exist, the construction method is adopted for solving the problem of integral demolition of a beam body, is small in operation influence, ensures the construction safety, and has certain popularization significance.