CN113334568A

CN113334568A - Segment whole-ring structure and segment whole-ring prefabricating method

Info

Publication number: CN113334568A
Application number: CN202110631338.7A
Authority: CN
Inventors: 赵修旺; 贾连辉; 毕程程; 于少辉; 白中坤; 王宁; 李应飞; 赵澍; 李明芳
Original assignee: China Railway Engineering Equipment Group Co Ltd CREG
Current assignee: China Railway Engineering Equipment Group Co Ltd CREG
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2021-09-03
Anticipated expiration: 2041-06-07
Also published as: CN113334568B

Abstract

The invention relates to a tube sheet integral ring structure and a tube sheet integral ring prefabricating method, wherein the prefabricating method comprises the following steps: step one, assembling a prefabricated mould, namely assembling the prefabricated mould according to a preset whole segment ring contour line, wherein a bottom template, an inner side template, an outer side template and a top template of the prefabricated mould enclose a casting ring cavity, a plurality of end plate groups are sequentially arranged in the casting ring cavity, each end plate group comprises two end plate groups which are detachably and fixedly assembled together, and any two adjacent end plate groups are respectively and fixedly assembled together relatively through an intermediate steel skeleton; step two, pouring concrete in the pouring ring cavity; and step three, removing the mold, maintaining, and separating corresponding two end head plates at each end head plate group to obtain a plurality of prefabricated segment blocks. Utilize prefabricated mould to form and pour the ring chamber, arrange end group and middle steel skeleton in it, pour the retarded soil in pouring the ring chamber, form the whole ring section of jurisdiction, owing to adopt the whole ring to pour fashioned mode, can effectively guarantee the shaping precision, be suitable for being applied to in the full-scale experiment.

Description

Segment whole-ring structure and segment whole-ring prefabricating method

Technical Field

The invention relates to a whole-ring structure of a duct piece and a whole-ring prefabricating method of the duct piece.

Background

At present, for the shield excavation of a subway tunnel, segments are needed to be used for building and supporting the tunnel wall. The segment ring is usually assembled and molded by adopting segmented prefabricated segments, and the mold corresponding to each segment comprises a bottom plate, an upper cover and four side plates. The production flow mainly comprises:

1) cleaning the mold to remove residual matters on the surface of the mold;

2) assembling the template, and spraying a release agent;

3) installing a steel bar framework in a die, and installing an embedded part at the same time;

4) pouring concrete;

5) after pouring and initial setting, carrying out steam curing on the cast duct piece;

6) and (4) carrying out demoulding treatment on the pipe piece, and placing the demoulded pipe piece in a water pool for maintenance until the design requirement is met.

In order to explore the mechanical characteristics of the novel duct piece, a full-scale test is usually carried out indoors or on site, and the full-scale test is to manufacture the actual duct piece one by one according to the design size so as to carry out a corresponding test. When full-scale testing, the requirement on the manufactured duct piece is high, the conventional block prefabricated duct piece is easy to have errors when being assembled, and the block prefabricated duct piece is not suitable for being applied to the duct piece trial manufacturing of the full-scale testing. Moreover, the number of the required pipe pieces for trial production of the single full-scale pipe piece is small, the special mould is high in spreading and selling cost, the requirements of steam and water maintenance on hardware are strict, and the whole cost is relatively high.

Disclosure of Invention

The invention aims to provide a method for prefabricating a whole ring of a pipe sheet, which aims to solve the technical problem that the mode of prefabricating in blocks and then integrally assembling in the prior art is not suitable for being applied to a full-scale test due to the error problem; meanwhile, the invention also provides a segment whole-ring structure which can be processed by the segment whole-ring prefabricating method.

In order to achieve the purpose, the technical scheme of the integral ring structure of the tube sheet provided by the invention is as follows:

a tube sheet monolith structure comprising:

the segment blocks are sequentially arranged in a butt joint mode along the preset segment whole-ring contour line, and the direction, which is the same as the extending direction of the preset segment whole-ring contour line, of the segment blocks is defined as the block length direction;

each segment block respectively comprises two end plates which are distributed at intervals along the whole ring contour line of the preset segment and a concrete body which is positioned between the two end plates and integrally cast with the two end plates, wherein a middle steel skeleton is arranged in the concrete body, the middle steel skeleton extends along the length direction of the block, and in the same segment block, two ends of the middle steel skeleton in the length direction of the block are correspondingly welded with the corresponding two end plates one by one;

bolt mounting holes are respectively formed in the head plates at the two ends of each segment block, and inter-block hand holes are formed in the concrete body corresponding to the bolt mounting holes;

in the whole ring contour line extending direction of the preset duct piece, two opposite end head plates at two ends of any two adjacent duct piece blocks are attached, and fastening bolts penetrate through inter-block hand holes in the duct piece blocks in bolt mounting holes in the two end head plates corresponding to the attachment, so that the two duct piece blocks are fixedly assembled together through the fastening bolts, and then a duct piece whole ring structure is formed.

The beneficial effects are that: in the pipe piece integral ring structure provided by the invention, the end plates of the adjacent pipe piece blocks can be fixedly assembled through the penetrating fastening bolts, so that all the pipe piece blocks are conveniently and sequentially arranged according to the preset pipe piece integral ring contour line, and the pipe piece integral ring structure is further formed. Because both ends board and concrete body integrated into one piece pour the shaping, can effectively guarantee the precision of assembling of section of jurisdiction whole ring structure under the condition that can realize whole ring processing preparation.

As a further improvement, the middle steel framework of each segment block comprises section steel extending along the length direction of the block and a plurality of longitudinal steel bars in welded connection with the section steel, the direction, consistent with the extending direction of a corresponding tunnel, on the segment block is defined as the width direction of the block, the longitudinal steel bars extend along the width direction of the block, and the longitudinal steel bars are distributed at intervals along the length direction of the block.

The beneficial effects are that: the middle steel skeleton comprises the transversely extending section steel and the longitudinally extending longitudinal steel bars, the strength of the middle steel skeleton can be effectively ensured, and the integral strength of the segment blocks can be further improved.

As a further improvement, more than two section steels are distributed at intervals in the width direction of the blocks, a plurality of blanking holes are sequentially distributed in each section steel along the length direction of the blocks, and each blanking hole penetrates through the corresponding section steel along the width direction of the blocks so as to allow concrete slurry to enter the lower part of the corresponding section steel when concrete is poured.

The beneficial effects are that: the section steel is provided with the blanking hole, so that concrete slurry can enter the lower part of the section steel when the section steel is conveniently poured and formed.

As a further improvement, the cross section of the inter-block hand hole in the length direction of the block is rectangular or trapezoidal.

The beneficial effects are that: the corresponding cross section of the hand hole between the blocks is rectangular or trapezoidal, and the bolt fastening operation is suitable for the hand hole between the blocks.

The technical scheme of the whole ring prefabricating method for the pipe sheet provided by the invention is as follows: a whole-ring prefabricating method for a pipe sheet comprises the following steps:

step one, assembling a prefabricated mould;

assembling a prefabricated mould according to a preset duct piece whole-ring contour line, wherein a pouring ring cavity is defined by a bottom template, an inner side template, an outer side template and a top template of the prefabricated mould, a plurality of end plate groups are sequentially arranged in the pouring ring cavity along the preset duct piece whole-ring contour line, each end plate group comprises two end plates which are detachably and fixedly assembled together through fastening bolts, inter-block hand hole sleeve boxes are respectively and fixedly arranged on two opposite sides of the two end plates of the end plate groups corresponding to the fastening bolts, the inter-block hand hole sleeve boxes are matched with the prefabricated mould to define a manual reserved cavity in the pouring ring cavity, and any two adjacent end plate groups are respectively and fixedly assembled together through a middle steel skeleton;

step two, pouring concrete in the pouring ring cavity;

and step three, removing the mold, maintaining, separating corresponding two end plates at each end plate group, fixing and assembling the corresponding two end plates together through a concrete body formed by integral pouring relatively to obtain a plurality of prefabricated segment blocks, and fixedly connecting any two prefabricated segment blocks together through corresponding fastening bolts by utilizing inter-block hand holes formed on the concrete body after removing the inter-block hand hole sleeve boxes, and sequentially fixing and assembling all the segment blocks together according to a preset segment whole ring contour line to form a segment whole ring structure.

The beneficial effects are that: according to the pipe piece whole-ring prefabricating method provided by the invention, the prefabricating mould is utilized to form the pouring ring cavity, the end plate group and the middle steel skeleton are arranged in the pouring ring cavity, then the retarded soil is poured in the pouring ring cavity to form the whole-ring pipe piece, and then the end plate group is detached to form the pipe piece block. Moreover, the intermediate steel skeleton fixed end plate group in the prefabricated mould is utilized, the position precision of the end plate group can be ensured, the integral strength of the formed segment blocks can be effectively improved, one side corresponding to the corresponding end plate is provided with an inter-block hand hole sleeve box, and then, the inter-block hand holes are formed for the convenience of subsequent forming, so that the corresponding segment blocks are spliced and assembled together.

As a further improvement, in the first step, a bottom template, an inner side template, an outer side template and a top template are sequentially arranged, the bottom template, the inner side template, the outer side template and the top template all extend along a preset segment whole-ring contour line, after the inner side template is arranged, the end plate group and the middle steel skeleton are arranged outside the inner side template along the preset segment whole-ring contour line, and then the outer side template is arranged.

The beneficial effects are that: the mode of installing the inner side template firstly, then installing the end plate group and the middle steel skeleton and then installing the outer side template is more suitable for vertical arrangement, is more convenient to install and is also convenient to adjust and replace.

As a further improvement, the middle steel skeleton comprises section steel which is arranged along the extension of the whole ring contour line of the preset segment, a plurality of blanking holes are sequentially arranged on the section steel along the length direction of the section steel, each blanking hole extends along the up-down direction, and when concrete is poured in the step two, concrete grout enters the lower part of the section steel through the blanking holes.

The beneficial effects are that: the blanking holes are formed in the profile steel, so that concrete can flow to the bottom of the pouring ring cavity conveniently when concrete pouring is carried out.

As a further improvement, the section steel is I-shaped steel or H-shaped steel, the section steel is provided with a web plate, the web plate of the section steel is horizontally arranged, and a plurality of blanking holes are sequentially distributed on the web plate of the section steel at intervals along the extension direction of the section steel.

The beneficial effects are that: the web horizontal arrangement of shaped steel, and arrange the unloading hole on the web, under the circumstances of guaranteeing intensity, conveniently process preparation unloading hole.

As a further improvement, the blanking hole has a set aperture, and in the second step, a vibrating rod is put through the blanking hole until the bottom of the casting ring cavity is vibrated to be compact until the concrete casting is completed.

The beneficial effects are that: the vibrating rod is arranged below the discharging hole, so that the vibrating is convenient to compact, and the pouring effect is improved.

As a further improvement, in the step one, the inter-block hand hole sleeve box is filled with expansion materials, so that concrete slurry is prevented from blocking the inter-block hand hole sleeve box during subsequent concrete pouring.

The beneficial effects are that: the expansion material is injected into the inter-block hand hole sleeve box, so that the inter-block hand hole sleeve box is conveniently prevented from being blocked by concrete slurry, and subsequent form removal and repeated use are influenced.

Drawings

FIG. 1 is a schematic view of a monolithic structure of a tube sheet provided by the present invention;

FIG. 2 is an enlarged view at H in FIG. 1;

FIG. 3 is a schematic view of the assembly of the section steel inside the concrete body in FIG. 1;

fig. 4 is a schematic diagram of a preset segment whole ring contour line according to embodiment 1 of the segment whole ring prefabricating method provided by the present invention;

fig. 5 is a schematic diagram of a whole ring prefabrication method for a pipe piece according to an embodiment 1 of the present invention after bottom formwork installation, inside formwork installation, framework installation, outside formwork installation, concrete pouring, and formwork removal (in fig. 5 (a), the inside formwork installation, fig. 5 (b), the framework installation, fig. 5 (c), the longitudinal reinforcement and an inter-block hand hole box installation, fig. 5 (e), the outside formwork installation, fig. 5 (f), and the concrete pouring, fig. 5 (g), the formwork removal);

FIG. 6 is a corresponding sectional view of FIG. 5 (wherein FIG. 6 (a) is a sectional view taken along line A-A in FIG. 5 (a); FIG. 6 (B) is a sectional view taken along line B-B in FIG. 5 (B); FIG. 6 (C) is a sectional view taken along line C-C in FIG. 5 (C); FIG. 6 (D) is a sectional view taken along line D-D in FIG. 5 (D); FIG. 6 (E) is a sectional view taken along line E-E in FIG. 5 (E); FIG. 6 (F) is a sectional view taken along line F-F in FIG. 5 (F); and FIG. 6 (G) is a sectional view taken along line G-G in FIG;

FIG. 7 is a corresponding top view of FIG. 5 (where FIG. 7 (a) is the top view of FIG. 5 (a); FIG. 7 (b) is the top view of FIG. 5 (b); FIG. 7 (c) is the top view of FIG. 5 (c); FIG. 7 (d) is the top view of FIG. 5 (d); FIG. 7 (e) is the top view of FIG. 5 (e); FIG. 7 (f) is the top view of FIG. 5 (f) with the top platen not shown; FIG. 7 (g) is the top view of FIG. 5 (g));

FIG. 8 is a schematic view of the intermediate segment block of FIG. 5;

fig. 9 is a sectional view of segment of a segment obtained in accordance with the segment full ring prefabrication method of the present invention in example 4.

Description of reference numerals:

1. a base; 2. a bottom form; 2-1, a top template; 3. an inner side template; 4. an outer side template; 5. back corrugation; 6. a screw rod; 7. bracing; 9. a reinforcement cage; 90. longitudinal reinforcing steel bars; 10. section steel; 10-1, blanking holes; 11. an end plate; 12. hand holes between blocks; 120. inter-block hand hole sleeve boxes; 13. hand holes between rings; 130. a hand hole spiral rib of the ring piece; 14. hoisting a hole sleeve; 15. a concrete filler; 150. a concrete body; 16. fastening a bolt; 100. a center point; 200. presetting a segment whole ring contour line; 300. segment division; 400. the intermediate segments are divided into blocks.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the 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 of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, elements recited by the phrase "comprising an … …" do not exclude the inclusion of such elements in processes or methods.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

The present invention will be described in further detail with reference to examples.

The whole-ring prefabricating method for the pipe piece is used for manufacturing the pipe piece structure by the whole ring, and each pipe piece is split into the blocks 300 after the pouring is finished, so that the manufacturing precision can be effectively guaranteed due to the fact that the whole ring is manufactured together, the problem of large error caused by block pouring and whole ring assembling is solved, and the whole-ring prefabricating method is suitable for testing the pipe piece applied to a full-scale test.

The invention provides an embodiment of a tube sheet integral ring structure, which comprises the following steps:

the segment whole ring structure in this embodiment can be fabricated by a segment whole ring prefabricating method as shown in fig. 1 to 3, wherein the segment whole ring structure specifically includes a plurality of segment segments 300, where the segment segments 300 can be sequentially arranged in a butt joint along a preset segment whole ring contour line 200, for the convenience of description, the direction of the segment segments 300, which is the same as the extending direction of the preset segment whole ring contour line 200, is defined as a segment length direction, the direction of the segment segments 300, which is the same as the extending direction of the corresponding tunnel, is defined as a segment width direction, each segment 300 includes two end plates 11 spaced apart from each other along the preset segment whole ring contour line 200, and a concrete body 150 located between the two end plates 11 and integrally cast with the two end plates 11, an intermediate steel skeleton is provided in the concrete body 150, the intermediate steel skeleton extends along the segment length direction, in the same segment block 300, two ends of the middle steel framework in the length direction of the block are correspondingly welded with the corresponding two end plates 11 one by one.

In addition, bolt mounting holes are respectively formed in the end plates 11 at the two ends of each segment block 300, inter-block hand holes 12 are formed in the concrete body corresponding to the bolt mounting holes, the cross section of each inter-block hand hole 12 in the length direction of the block is trapezoidal, and the trapezoidal structure refers to an approximately trapezoidal structure. As shown in fig. 2, in the extending direction of the preset duct piece whole ring contour line 200, two opposite end plates 11 at two ends of any two adjacent duct piece blocks 300 are attached, fastening bolts 16 penetrate through the inter-block hand holes 12 on the duct piece blocks 300 in bolt mounting holes on the two end plates 11 correspondingly attached, and the two adjacent duct piece blocks 300 can be fixedly assembled together through the corresponding fastening bolts 16, so that a duct piece whole ring structure is formed.

In this embodiment, the middle steel skeleton of each segment block 300 includes the section steel 10 extending along the block length direction and the plurality of longitudinal steel bars 90 welded to the section steel 10, the longitudinal steel bars 90 extend along the block width direction, and all the longitudinal steel bars 90 are distributed at intervals along the block length direction to form a stronger supporting strength. Of course, in other embodiments, if the strength can meet the design requirement, only the section steel can be arranged, and the longitudinal steel bars are omitted.

In addition, in order to improve the strength, two section steels 10 are distributed at intervals in the width direction of the block, a plurality of blanking holes 10-1 are sequentially arranged on each section steel 10 along the length direction of the block, and each blanking hole 10-1 penetrates through the corresponding section steel 10 along the width direction of the block, so that concrete slurry enters the lower part of the corresponding section steel 10 when concrete pouring is carried out.

In the present embodiment, the cross section of the corresponding inter-block hand hole 12 in the block length direction is an approximately trapezoidal structure, and in other embodiments, the cross section of the inter-block hand hole 12 may also be an approximately rectangular structure as long as a sufficient operation space can be provided.

In this embodiment, the intermediate steel skeleton in the concrete body 150 includes the steel sections 10, and in other embodiments, as shown in fig. 9, the intermediate steel skeleton may also be a steel bar cage 9 to ensure the structural strength of the segment block.

Specific example 1 of the method for prefabricating the whole ring of the pipe piece provided by the present invention:

the prefabricating method integrally comprises the following steps:

step one, assembling a prefabricated mould

According to the prefabricated mould assembled by the preset segment whole-ring contour line 200 shown in fig. 4, a casting ring cavity is defined by the bottom template 2, the inner side template 3, the outer side template 4 and the top template 2-1 of the prefabricated mould, a plurality of end plate groups are sequentially arranged in the casting ring cavity along the preset segment whole-ring contour line 200, each end plate group comprises two end plate groups 11 which are detachably and fixedly assembled together, and any two adjacent end plate groups are respectively and fixedly assembled together through a middle steel framework.

Certainly, in order to realize the mode of fastening and assembling through bolts, the interblock hand hole sleeve boxes 120 are respectively and fixedly arranged on the two opposite sides of the two end head plates 11 of the end plate groups corresponding to the fastening bolts 16, the interblock hand hole sleeve boxes 120 are matched with the prefabricated mold to enclose the manual reserved cavity in the casting annular cavity, and any two adjacent end head plate groups are respectively and fixedly assembled together through the middle steel framework.

And step two, pouring concrete in the pouring ring cavity.

And step three, after the segment reaches the set strength, removing the mold and maintaining in time, separating the corresponding two end plates 11 at each end plate group, fixing and assembling the corresponding two end plates 11 together relatively through a concrete body 150 formed by integral pouring to obtain a plurality of prefabricated segment blocks 300, and fixing and assembling all the segment blocks 300 together according to the preset segment whole-ring contour line 200 in sequence by utilizing the inter-block hand holes 12 formed on the concrete body 150 after removing the inter-block hand hole sleeve boxes 120 to form the segment whole-ring structure.

Specifically, the prefabricated mold in the first step can be formed by splicing and assembling in the following manner, and when the prefabricated mold is assembled, the steps of prefabricated structure positioning, bottom formwork installation, inner formwork installation, framework installation, outer formwork installation and top formwork installation can be performed.

And (3) positioning a prefabricated structure: the field hardening and leveling method is characterized in that the field hardening and leveling can be firstly carried out, the field hardening and leveling range can be determined according to actual requirements because the prefabricated pipe piece is of an annular closed structure, the field hardening and leveling range can be hardened and leveled within a certain range along the bottom of the prefabricated structure, and the field hardening and leveling range can be completely hardened and leveled in the annular closed structure. As shown in fig. 4, a central point 100 is determined, and then a preset segment complete ring contour line 200 is drawn on site by combining a design drawing and a measuring device, wherein the specific contour line can be an inner edge line, a central line or an outer edge line.

Installing a bottom template: the prefabricated positioning structure is arranged according to a central point 100 and a preset segment whole-ring contour line 200 shown in fig. 4, a base 1 and a bottom template 2 can be arranged, the base 1 and the bottom template 2 both extend along the preset segment whole-ring contour line 200, the local structure is shown in fig. 5 (a), fig. 6 (a) and fig. 7 (a), and the bottom template 2 is fixed on the base 1 by adopting necessary fixing measures.

Installing an inner side template: as shown in fig. 5 (b), fig. 6 (b) and fig. 7 (b), the inner side template 3 is installed on the base 1, the inner side template 3 is vertically arranged, the inner side template 3 and the bottom template 2 can be fixed by gluing, welding or installing a locking pin block, and the like, and the inner side template 3 is also arranged in an extending manner along the whole ring contour line 200 of the preset segment. And then, a back edge 5 is installed on the inner side of the inner side template 3, and finally, the inner inclined struts 7 are installed at intervals as required, so that the stability of the whole structure of the inner side template 3 is improved. Here, the inner side of the inner formwork 3 refers to that the inner formwork is surrounded into a ring shape, and the ring-shaped inner side is the inner side of the inner formwork.

Installing a framework: as shown in fig. 5 (c), fig. 6 (c), fig. 7 (c), fig. 5 (d), fig. 6 (d) and fig. 7 (d), each end plate 11 is assembled together two by two through bolt fastening, so as to form a plurality of end plate groups, each end plate group is sequentially arranged along a preset segment whole ring contour line 200, then an intermediate steel skeleton is fixedly arranged between two end plate groups arranged at any interval, the intermediate steel skeleton comprises section steel 10, the section steel 10 extends along a separated length direction, the section steel 10 is specifically an i-shaped steel, in the embodiment, the section steel 10 between any two adjacent end plate groups is arranged at two intervals along the up-down direction, and two ends of each section steel 10 are correspondingly welded with the corresponding end plate 11. And, middle steel skeleton still includes a plurality of longitudinal reinforcement 90 with shaped steel 10 welded connection, if define as the width direction of piecemeal in fig. 1 the direction unanimous with corresponding tunnel extending direction on segment block 300, each longitudinal reinforcement 90 extends along the width direction of piecemeal, each longitudinal reinforcement 90 along the length direction interval distribution of piecemeal is a plurality of, with longitudinal reinforcement 90 and shaped steel 10 welded connection to improve middle steel skeleton's structural strength.

It should be noted that the end plate group can be vertical or inclined, and it can be arranged according to actual needs.

The I-shaped steel is horizontally arranged, a web plate of the I-shaped steel is horizontally arranged, and a plurality of blanking holes 10-1 are sequentially arranged on the web plate of the I-shaped steel at intervals along the preset segment whole ring contour line 200 and used for allowing poured concrete to flow below the section steel 10.

In fact, for the upper and lower layers of the section steel 10, the vertical positions of the blanking holes 10-1 are kept consistent, so that the blanking holes 10-1 on the upper and lower different layers of the section steel 10 are correspondingly communicated with each other, and the blanking holes 10-1 also have set hole diameters for the vibrating rods to pass through, so that the vibrating rods are put into the blanking holes 10-1 to be vibrated and compacted at the bottom of the casting ring cavity until the concrete casting is completed. The set aperture is large enough to ensure the vibrating rod to pass through normally.

All the end plate groups are fixedly assembled together through the intermediate steel skeleton to form a whole. The whole formed by the end plate group and the middle steel framework is arranged outside the inner formwork 3. After the installation of the framework is completed, as shown in fig. 5 (d), the stirrup, the hoisting hole spiral rib, the inter-ring hand hole 13 spiral rib, the inter-block hand hole sleeve box 120 and the like can be welded to corresponding positions, wherein the inter-block hand hole sleeve box 120 is fixedly arranged on two opposite sides of the two end head plates 11 of the end head plate group corresponding to the fastening bolts 16 respectively, so that the inter-block hand hole sleeve box 120 is matched with a prefabricated mold to enclose a manual reserved cavity in the casting ring cavity, and the inner side template 3 is provided with corresponding hoisting holes corresponding to the hoisting hole spiral ribs to play a corresponding reinforcing role.

In this embodiment, the inter-block hand hole sleeve box 120 is a hexahedral shell with two open sides, one open side is welded to the bolt hole position of the end plate 11, the other open side abuts against the inner side formwork 3, after the end plate 11 is connected by the bolt, an expansion material is injected into the inter-block hand hole sleeve box 120, so that the inter-block hand hole sleeve box 120 is prevented from being blocked by concrete slurry during subsequent concrete pouring, and the expansion material is taken out during final formwork removal, and of course, the inter-block hand hole sleeve box 120 also needs to be removed during formwork removal, so as to form the inter-block hand holes 12 on the corresponding concrete body 150.

Installing an outer side template: as shown in fig. 5 (e), 6 (e) and 7 (e), an outer formwork 4 is arranged on the outer side of the end plate group and the middle steel skeleton, the outer formwork 4 is vertically arranged, and the outer formwork 4 and the bottom formwork 2 are fixed by gluing, welding or installing a lock pin block. And then, a back edge 5 is installed on the outer side of the outer formwork 4, and then, external inclined struts 7 are installed at intervals according to needs, so that the stability of the whole structure of the outer formwork 4 is improved.

Installing a top template: as shown in fig. 5 (e), 6 (e) and 7 (e), the top form 2-1 is inserted between the inner form 3 and the outer form 4, and the joints of the different forms are bonded with glue or spot-welded.

And finally, hoisting holes are formed in the outer template 4, hoisting hole sleeves 14 transversely penetrate through the hoisting holes in the inner template 3 and the outer template 4, the sleeves are fixed, gaps among pipe seams are filled, and the hoisting hole sleeves 14 are reinforced by hoisting hole spiral ribs.

According to the steps, the prefabricated mould can be assembled to obtain, the prefabricated mould integrally comprises a bottom template 2, an inner side template 3, an outer side template 4 and a top template 2-1 which extend along a preset duct piece whole ring contour line 200, the inner side template 3 and the outer side template 4 are vertically arranged, a pouring ring cavity is defined by the bottom template 2, the inner side template 3, the outer side template 4 and the top template 2-1 and is used for pouring concrete filler 15, a plurality of end plate groups are sequentially arranged in the pouring ring cavity along the preset duct piece whole ring contour line 200 at intervals, each end plate group comprises two end plate groups 11 which are detachably and fixedly assembled together, an intermediate steel framework is fixedly connected between the two end plate groups 11 at the opposite inner sides of the two end plate groups which are arranged at any intervals, the intermediate steel framework extends along the preset duct piece whole ring contour line 200, and specifically comprises section steel 10 and corresponding longitudinal steel bars 90 which are arranged along the preset duct piece whole ring contour line 200, the structural steel 10 is specifically an I-shaped steel, a web plate of the I-shaped steel is horizontally arranged, a plurality of blanking holes 10-1 are sequentially distributed on the web plate of the structural steel 10 at intervals along the extension direction of the structural steel 10, and each blanking hole 10-1 extends along the vertical direction and is used for allowing poured concrete filler 15 to pass through to enter the lower part of the structural steel 10.

After the prefabricated mold is assembled and formed, as shown in fig. 5 (f), fig. 6 (f) and fig. 7 (f), concrete filler 15 is poured in the pouring annular cavity, when concrete is poured, the concrete is poured to the bottom of the pouring annular cavity through the blanking hole 10-1 on the section steel 10, and in the process, a vibrating rod can be fed through the blanking hole 10-1 until the bottom of the pouring annular cavity is vibrated to be compact until the concrete pouring is completed. The structure of the demolded segment is shown in fig. 5 (g), fig. 6 (g), fig. 7 (g) and fig. 1, the concrete filler 15 forms a segment block 300, the end of the segment block 300 is provided with end plates 11, and the adjacent end plates 11 are fixedly assembled together through bolts to form an end plate group. After the segment reaches a set strength, removing the mold and maintaining in time, separating corresponding two end plates 11 at each end plate group, fixing and assembling the corresponding two end plates 11 relatively together through a concrete body 150 formed by integral pouring to obtain a plurality of prefabricated segment blocks 300, wherein the structure of a middle segment block 400 is shown in figure 8, a hoisting hole sleeve 14, a ring hand hole and an inter-block hand hole 12 are arranged on the concrete body 150 of the middle segment block 400, the end plates 11 are respectively and integrally arranged at the corresponding two ends of the concrete body 150, one end plate 11 is vertically arranged, the other end plate is obliquely arranged, when in installation, the two segment blocks 300 which are prefabricated randomly can be fixedly connected together through corresponding fastening bolts 16 by utilizing the inter-block hand holes 12 formed on the concrete body 150 after the inter-block hand hole sleeve boxes 120 are removed, and all the segment blocks 300 are sequentially fixed and assembled together according to a preset whole ring profile line 200, the whole ring structure of the segment can be formed, and then the related test can be carried out.

The method for prefabricating the whole ring of the pipe piece provided by the embodiment is flexible in prefabricating mode, is suitable for conventional or special-shaped pipe pieces with different shapes and sizes, can be specifically prefabricated according to the shape of the actual pipe piece, can be circular, rectangular, rectangle-like, horseshoe-shaped and the like, and can also be used for prefabricating annular pipe pieces with special shapes.

The prefabricated mould that adopts is comparatively convenient in the dismouting on the whole, and the material is easily got, and repeatedly usable, and the prefabrication cost is lower relatively to, owing to be whole ring centralized prefabrication, the prefabricated back of accomplishing is divided into the piece again and is arranged, can effectively guarantee to assemble the precision, is suitable for being applied to in the experimental section of jurisdiction of full scale prefabrication scene.

Specific example 2 of the method for prefabricating the whole ring of the pipe piece provided by the invention:

the difference from the embodiment is mainly that: in example 1, the section steel is specifically an i-beam. In this embodiment, the shaped steel can be H shaped steel, and at this moment, the web of H shaped steel also can the horizontal arrangement, sets up the unloading hole on the web of H shaped steel, supplies the concrete filler to pass through.

Of course, in other embodiments, other shaped steels, such as angle steels, may be used.

Specific example 3 of the method for prefabricating the whole ring of the pipe piece provided by the present invention:

the difference from the embodiment is mainly that: in example 1, after the inner formwork is installed, the end plate and the intermediate steel skeleton are installed, and then the outer formwork is installed. In this embodiment, after the inner formwork is installed, the outer formwork is installed first, and the end plate and the intermediate steel skeleton which are fixedly assembled together are hoisted and placed into the formed annular groove from top to bottom, so that the installation is relatively inconvenient.

Specific example 4 of the method for prefabricating the whole ring of the pipe piece provided by the present invention:

the difference from example 1 is mainly that: in embodiment 1, the intermediate steel skeleton comprises a steel section. In this embodiment, the steel bar is omitted, and as shown in fig. 9, the reinforcement cage 9 is provided in the concrete body 150, and the reinforcement cage 9 is used as the intermediate steel frame.

It should be noted that the method for prefabricating the whole ring of the pipe piece provided by the invention can be applied to prefabricating the pipe piece in a full-scale test, and can also be applied to prefabricating the pipe piece in other scenes, such as a scale-down test and a normal pipe piece trial-making.

Finally, although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments without departing from the inventive concept, or some of the technical features may be replaced with equivalents. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A tube sheet monolith structure comprising:

the segment dividing blocks (300) are sequentially arranged in a butt joint mode along a preset segment whole-ring contour line (200), and the direction, which is the same as the extending direction of the preset segment whole-ring contour line (200), of the segment dividing blocks (300) is defined as the length direction of the dividing blocks;

each segment block (300) comprises two end plates (11) which are distributed at intervals along the preset segment whole-ring contour line (200) and a concrete body (150) which is positioned between the two end plates (11) and integrally cast with the two end plates (11), wherein a middle steel skeleton is arranged in the concrete body (150), the middle steel skeleton extends along the block length direction, and in the same segment block (300), two ends of the middle steel skeleton in the block length direction are correspondingly welded with the corresponding two end plates (11) one by one;

bolt mounting holes are respectively formed in two end plates (11) of each segment block (300), and inter-block hand holes (12) are formed in the concrete body (150) corresponding to the bolt mounting holes;

on the whole ring contour line (200) extending direction of the preset segment, two end plates (11) at two opposite ends of any two adjacent segment blocks (300) are attached, and fastening bolts (16) penetrate through inter-block hand holes (12) on the segment blocks (300) in bolt mounting holes on the two end plates (11) corresponding to the attachment, so that the two segment blocks (300) are fixedly assembled together through the fastening bolts (16), and then a segment whole ring structure is formed.

2. The segment whole ring structure according to claim 1, wherein the middle steel skeleton of each segment (300) comprises a section steel (10) extending along the length direction of the segment and a plurality of longitudinal steel bars (90) welded to the section steel (10), the direction of the segment (300) consistent with the extending direction of the corresponding tunnel is defined as the width direction of the segment, the longitudinal steel bars (90) extend along the width direction of the segment, and the longitudinal steel bars (90) are distributed at intervals along the length direction of the segment.

3. The segment whole ring structure according to claim 2, wherein more than two section steels (10) are distributed at intervals in the width direction of the segment, a plurality of blanking holes (10-1) are sequentially arranged on each section steel (10) along the length direction of the segment, and each blanking hole (10-1) penetrates through the corresponding section steel (10) along the width direction of the segment so as to allow concrete slurry to enter below the corresponding section steel (10) when concrete pouring is performed.

4. The segment full ring structure according to claim 1, 2 or 3, wherein the cross section of the inter-block hand holes (12) in the block length direction is rectangular or trapezoidal.

5. A whole-ring prefabricating method for a pipe sheet is characterized by comprising the following steps:

step one, assembling a prefabricated mould;

assembling a prefabricated mould according to a preset duct piece whole-ring contour line (200), wherein a pouring annular cavity is defined by a bottom template (2), an inner side template (3), an outer side template (4) and a top template (2-1) of the prefabricated mould, a plurality of end plate groups are sequentially arranged in the pouring annular cavity along the preset duct piece whole-ring contour line (200), each end plate group comprises two end plates (11) which are detachably and fixedly assembled together through fastening bolts (16), inter-block hand hole sleeve boxes (120) are respectively and fixedly arranged on two opposite sides of the two end plates (11) of the end plate groups corresponding to the fastening bolts (16), the inter-block hand hole sleeve boxes (120) are matched with the prefabricated mould to define a manual reserved cavity in the pouring annular cavity, and any two adjacent end plate groups are respectively and fixedly assembled together through a middle steel skeleton;

step two, pouring concrete in the pouring ring cavity;

and step three, removing the mold, maintaining, separating corresponding two end plates (11) at each end plate group, fixing and assembling the corresponding two end plates (11) relatively through a concrete body (150) formed by integral pouring to obtain a plurality of prefabricated segment blocks (300), fixedly connecting any two prefabricated segment blocks (300) together through corresponding fastening bolts (16) by utilizing inter-block hand holes (12) formed on the concrete body (150) after removing the inter-block hand hole sleeve boxes (120), and sequentially fixing and assembling all the segment blocks (300) together according to a preset segment whole ring contour line (200) to form a segment whole ring structure.

6. The segment whole-ring prefabrication method according to claim 5, wherein in the step one, a bottom formwork (2), an inner side formwork (3), an outer side formwork (4) and a top formwork (2-1) are sequentially arranged, the bottom formwork (2), the inner side formwork (3), the outer side formwork (4) and the top formwork (2-1) all extend along a preset segment whole-ring contour line (200), wherein after the inner side formwork (3) is arranged, the end plate group and the middle steel skeleton are arranged on the outer side of the inner side formwork (3) along the preset segment whole-ring contour line (200), and then the outer side formwork (4) is arranged.

7. The segment whole-ring prefabrication method according to claim 6, wherein the intermediate steel skeleton comprises section steel (10) which is arranged along a preset segment whole-ring contour line (200) in an extending mode, a plurality of blanking holes (10-1) are sequentially formed in the section steel (10) along the length direction of the section steel, each blanking hole (10-1) extends in the vertical direction, and when concrete is poured in the second step, concrete slurry enters the lower portion of the section steel (10) through the blanking holes (10-1).

8. The segment whole-ring prefabrication method according to claim 7, wherein the section steel (10) is I-shaped steel or H-shaped steel, the section steel (10) is provided with a web plate, the web plate of the section steel (10) is horizontally arranged, and a plurality of blanking holes (10-1) are sequentially distributed on the web plate of the section steel (10) at intervals along the extension direction of the section steel (10).

9. The segment whole ring prefabrication method according to claim 7 or 8, wherein the blanking hole (10-1) has a set aperture, and in the second step, a vibrating rod is dropped through the blanking hole (10-1) until the bottom of the casting ring cavity is vibrated to be compact until the concrete casting is completed.

10. The method for prefabricating a full ring of segments according to claim 6 or 7 or 8, wherein in step one, the inter-block hand-hole sleeve (120) is filled with an expansion material to prevent concrete grout from blocking the inter-block hand-hole sleeve (120) during subsequent concrete pouring.