阅读说明：本技术 一种大调整量板式无砟轨道及其调高方法 (Large-adjustment-quantity plate type ballastless track and height adjustment method thereof ) 是由 任娟娟 陈应东 荀宇星 刘明明 庞玲 杨荣山 赵坪锐 邓世杰 杜威 曾学勤 韦臻 于 2019-10-23 设计创作，主要内容包括：本发明公开了一种大调整量板式无砟轨道及其调高方法,涉及铁路轨道沉降调高技术领域,其中无砟轨道包括钢轨、承轨台、轨道板、自密实混凝土层、支承层以及用于调高的实现无级调高的千斤顶,通过千斤顶将自密实混凝土层及以上的部件顶起,顶升方式相对于现有技术为大调量调节方式,能够一次性的使得自密实混凝土层与支承层之间留出调高所需的混凝土浇筑区域,效率极高；通过在混凝土浇筑区域灌满自密实混凝土,能够保证了新混凝土与原自密实混凝土层的紧密连接,最后能够形成全新的加厚的新自密实混凝土层,继而达到调高目的；千斤顶能够重复使用,一旦轨道出现沉降,可再次利用千斤顶调高,调整量可控性好。(The invention discloses a large-adjustment-amount plate-type ballastless track and a heightening method thereof, and relates to the technical field of railway track settlement heightening, wherein the ballastless track comprises a steel rail, a rail bearing platform, a track plate, a self-compacting concrete layer, a supporting layer and a jack for realizing stepless heightening, the self-compacting concrete layer and the above components are jacked up by the jack, the jacking mode is a large-adjustment-amount adjusting mode relative to the prior art, a concrete pouring area required for heightening can be reserved between the self-compacting concrete layer and the supporting layer at one time, and the efficiency is extremely high; by filling the self-compacting concrete in the concrete pouring area, the close connection between the new concrete and the original self-compacting concrete layer can be ensured, and finally a brand new thickened new self-compacting concrete layer can be formed, so that the height adjustment purpose is achieved; the jack can be used repeatedly, once the track subsides, can utilize the jack to increase again, and the adjustment volume controllability is good.)

1. A large-adjustment-capacity plate-type ballastless track comprises a steel rail, a rail bearing platform, a track plate, a self-compacting concrete layer and a bearing layer which are sequentially arranged from top to bottom, and is characterized in that,

a jack mounting hole is formed in the top surface of the supporting layer, a jack is fixedly embedded in the jack mounting hole, the jacking end of the jack vertically faces to the bottom surface of the self-compacting concrete layer, and when the jack is completely contracted, the jacking end of the jack is located in the jack mounting hole;

the jack is connected with a manual hydraulic pump through an oil pipe, the oil pipe is embedded in the supporting layer, and the manual hydraulic pump is located on the outer side of the ballastless track.

2. The large-adjustment-amount plate type ballastless track of claim 1, wherein a door-shaped steel bar is embedded between the track plate and the self-compacting concrete layer.

3. The large adjustment amount slab ballastless track of claim 1, wherein the number of the jacks is at least 4, and the jacks are uniformly arranged in the supporting layer.

4. The large-adjustment-amount slab ballastless track of claim 1, wherein a groove is formed in an upper surface of the supporting layer, and a protrusion which is matched and clamped in the groove is formed in a bottom surface of the self-compacting concrete layer.

5. A height adjustment method for a large-adjustment-quantity plate type ballastless track specifically comprises the following steps:

s1, obtaining a set value of the jacking height of the track slab through CP III measurement and calculation;

s2, simultaneously controlling the manual hydraulic pumps of all the jacks to synchronously lift the jacking ends of all the jacks to synchronously jack the self-compacting concrete layer, indirectly jacking the track slab, stopping jacking when the jacking height of the track slab reaches the set jacking height value, keeping the elevations of the current track slab and the self-compacting concrete layer, and reserving a space between the self-compacting concrete layer and the supporting layer as a new self-compacting concrete pouring area;

s3, removing the original geotextile isolation layer on the bottom surface of the self-compacting concrete layer, inserting a concrete cushion block into the concrete pouring area, pressing the concrete cushion block on the supporting layer, and supporting the self-compacting concrete layer together with the jack;

s4, controlling the contraction jack to enable the jacking end of the contraction jack to be lower than the top surface of the supporting layer;

s5, laying a geotextile isolation layer on the upper surface of the supporting layer, wherein the newly laid geotextile isolation layer completely covers the jack mounting hole;

s6, drilling a pouring hole on the track slab through the concrete core drilling machine, wherein the pouring hole extends from the track slab to the self-compacting concrete layer and leads to a new self-compacting concrete pouring area;

s7, paving longitudinally and transversely staggered reinforcing steel bars in a new self-compacting concrete pouring area to form a reinforcing steel bar mesh, and pressing the reinforcing steel bar mesh on the newly paved geotextile isolation layer;

s8, installing a steel template, enclosing the open positions around the concrete pouring area through the steel template, and drilling air holes for communicating the concrete pouring area with the external atmosphere on the steel template;

s9, pouring self-compacting concrete into the concrete pouring area from the pouring hole until the grout flows out of the air holes and the pouring hole is filled, and stopping pouring;

s10, after the self-compacting concrete is poured for 8 days, the steel formwork is dismantled, after the formwork is dismantled for 28 days, the ballastless track is put into use, and the ballastless track is lifted.

Technical Field

The invention relates to a large-adjustment-amount plate-type ballastless track for a railway and a height adjustment method thereof, which are designed aiming at the technical scheme that the plate-type ballastless track needs to be subjected to large height adjustment in a special section.

Background

The conventional CRTS III plate type ballastless track comprises a steel rail, an elastic fastener, a track plate, a self-compacting concrete layer, an isolation layer, a reinforced concrete base with a groove and the like. The ballastless track is acted by multiple factors such as train load, natural environment and the like during operation, and large subgrade settlement can be generated in some special weak sections, so that the smoothness of the track structure is influenced, and the driving safety is endangered. Because the integral rigidity of the ballastless track is higher, the fastener system is almost the only structure for adjusting the height of the track surface, when the height of the ballastless track is adjusted by the fastener system, one mode is to change the thickness of the backing plate under the track, the height adjustment is realized by filling the backing plates with different thicknesses, the other mode is to fill the height-adjusting backing plate under the iron backing plate, and the height adjustment amount of the fastener system is limited, so that the requirement of large height adjustment amount cannot be met. Therefore, according to the structure of the CRTS III plate-type ballastless track, it is necessary to research a technical scheme of a novel ballastless track with large height adjustment.

Disclosure of Invention

The invention aims to provide a large-adjustment-amount slab ballastless track and a height adjustment method thereof, which can alleviate the problems.

In order to alleviate the above problems, the technical scheme adopted by the invention is as follows:

in a first aspect, the invention provides a large-adjustment-amount plate-type ballastless track, which comprises a steel rail, a rail bearing platform, a track plate, a self-compacting concrete layer and a bearing layer which are sequentially arranged from top to bottom;

a jack mounting hole is formed in the top surface of the supporting layer, a jack is fixedly embedded in the jack mounting hole, the jacking end of the jack vertically faces to the bottom surface of the self-compacting concrete layer, and when the jack is completely contracted, the jacking end of the jack is located in the jack mounting hole;

the jack is connected with a manual hydraulic pump through an oil pipe, the oil pipe is embedded in the supporting layer, and the manual hydraulic pump is located on the outer side of the ballastless track.

The technical effect of the technical scheme is as follows: the jack is additionally arranged on the basis of the prior art, is positioned below the self-compacting concrete layer, and can jack up the self-compacting concrete layer and a series of components on the self-compacting concrete layer to make up the settlement of the track; the jack has a large height adjustment amount, is suitable for special sections of a track needing large height adjustment, can realize continuous large-height adjustment jacking operation of the track, and is very convenient to control the jack due to the fact that jack oil pipes are pre-buried in a supporting layer and jacking operation parts of the jack oil pipes are designed outside a ballastless track.

Optionally, a door-shaped steel bar is embedded between the track slab and the self-compacting concrete layer.

Optionally, the number of jacks is at least 4, and the jacks are uniformly arranged in the bearing layer.

Optionally, the upper surface of the supporting layer is provided with a groove, and the bottom surface of the self-compacting concrete layer is provided with a protrusion clamped in the groove in a matching manner.

The technical effect of the technical scheme is as follows: the longitudinal and transverse displacement of the track plate is limited, and longitudinal and transverse forces are provided.

In a second aspect, the invention provides a height adjustment method for a large-adjustment-amount slab ballastless track, which specifically comprises the following steps:

s1, obtaining a set value of the jacking height of the track slab through CP III measurement and calculation;

s2, simultaneously controlling the manual hydraulic pumps of all the jacks to synchronously lift the jacking ends of all the jacks to synchronously jack the self-compacting concrete layer, indirectly jacking the track slab, stopping jacking when the jacking height of the track slab reaches the set jacking height value, keeping the elevations of the current track slab and the self-compacting concrete layer, and reserving a space between the self-compacting concrete layer and the supporting layer as a new self-compacting concrete pouring area;

s3, removing the original geotextile isolation layer on the bottom surface of the self-compacting concrete layer, inserting a concrete cushion block into the concrete pouring area, pressing the concrete cushion block on the supporting layer, and supporting the self-compacting concrete layer together with the jack;

s4, controlling the contraction jack to enable the jacking end of the contraction jack to be lower than the top surface of the supporting layer;

s5, laying a geotextile isolation layer on the upper surface of the supporting layer, wherein the newly laid geotextile isolation layer completely covers the jack mounting hole;

s6, drilling a pouring hole on the track slab through the concrete core drilling machine, wherein the pouring hole extends from the track slab to the self-compacting concrete layer and leads to a new self-compacting concrete pouring area;

s7, paving longitudinally and transversely staggered reinforcing steel bars in a new self-compacting concrete pouring area to form a reinforcing steel bar mesh, and pressing the reinforcing steel bar mesh on the newly paved geotextile isolation layer;

s8, installing a steel template, enclosing the open positions around the concrete pouring area through the steel template, and drilling air holes for communicating the concrete pouring area with the external atmosphere on the steel template;

s9, pouring self-compacting concrete into the concrete pouring area from the pouring hole until the grout flows out of the air holes and the pouring hole is filled, and stopping pouring;

s10, after the self-compacting concrete is poured for 8 days, the steel formwork is dismantled, after the formwork is dismantled for 28 days, the ballastless track is put into use, and the ballastless track is lifted.

The technical effect of the technical scheme is as follows: the self-compacting concrete layer and the components above are jacked up through the jack, the jacking mode is a large-adjustment adjusting mode compared with the prior art, a concrete pouring area required for adjustment can be reserved between the self-compacting concrete layer and the supporting layer at one time, and the efficiency is high; by filling the self-compacting concrete in the concrete pouring area, the close connection between the new concrete and the original self-compacting concrete layer can be ensured, and finally a brand new thickened new self-compacting concrete layer can be formed, so that the height adjustment purpose is achieved; the jack can be used repeatedly, once the rail subsides, the height can be adjusted by the jack again, the controllability of the adjustment amount is good, and the stepless adjustment of the rail structure in the adjustment range can be realized; when the track is heightened, the operation is simple, the construction is convenient, the requirements of high efficiency and high speed of ballastless track maintenance engineering are met, the practicability is strong, and the popularization prospect is wide.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a cross-sectional view of a large-adjustment-amount slab ballastless track according to an embodiment of the present invention;

fig. 2 is a three-dimensional explosion structure diagram of the large-adjustment-amount slab ballastless track according to the embodiment of the invention;

FIG. 3 is a three-dimensional structure diagram of the self-compacting concrete layer and its upper part after being lifted by a jack according to the embodiment of the present invention;

fig. 4 is a three-dimensional structure diagram of the large-adjustment-amount slab ballastless track after being jacked, reinforcing steel bars are additionally paved, and a steel template is installed in the embodiment of the invention;

the labels in the figure are: 1-steel rail; 2-a rail bearing platform; 3, a track slab; 4-door-shaped steel bars; 5-self-compacting concrete layer; 6-reinforcing mesh; 7, a jack; 8-a support layer; 9-oil pipe; 10, forming a groove; 11-a perfusion hole; 12-steel moulding plate; 13-air holes.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally put in use of products of the present invention, and are only for convenience of description and simplification of description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention.