CN215150318U - Gypsum shield constructs section of jurisdiction model and pours mould - Google Patents
Gypsum shield constructs section of jurisdiction model and pours mould Download PDFInfo
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- CN215150318U CN215150318U CN202120187475.1U CN202120187475U CN215150318U CN 215150318 U CN215150318 U CN 215150318U CN 202120187475 U CN202120187475 U CN 202120187475U CN 215150318 U CN215150318 U CN 215150318U
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Abstract
The utility model provides a gypsum shield segment model pouring mould, which comprises an upper cover plate, a lower cover plate, an inner mould, an outer mould and a cover plate fixing bolt, wherein the upper cover plate and the lower cover plate are arranged in parallel up and down; the inner mold and the outer mold are both vertically fixed between the upper cover plate and the lower cover plate, the outer side of the inner mold is sleeved with the outer mold, the inner mold and the outer mold are arranged at intervals, and a gypsum pouring area is formed between the inner mold and the outer mold; the upper cover plate and the lower cover plate are fixedly connected together through a cover plate fixing bolt; the utility model discloses a set up centre form and external mold between upper cover plate and lower cover plate, form the gypsum and pour the district between centre form and the external mold, fixed through apron fixing bolt between the upper and lower cover plate, guaranteed the shaping of gypsum shield tunnel segment model, realize the fine simulation to the gypsum shield tunnel segment to the mechanics behavior characteristic of full research section of jurisdiction; the structure is fine, the operation is feasible, the test result can be real and reliable, the adjustment can be carried out according to the actual design, and effective guidance can be provided for the actual engineering construction.
Description
Technical Field
The utility model belongs to the technical field of tunnel engineering structure mould, in particular to gypsum shield constructs section of jurisdiction model casting die.
Background
In recent years, with the rapid development of urban rail transit systems, a large number of built urban subway tunnels face the challenge of complex geological conditions, and more attention needs to be paid to the research related to tunnel structures, so that the later-stage operation safety of subways is ensured. The subway shield tunnel is more and more favored due to the characteristics of small risk, short construction period, low cost and the like. In order to study the influence of complex geological conditions on a subway shield tunnel and understand the mechanical behavior characteristics related to the structure, indoor reduced scale model test study is often required in the early stage of construction; the gypsum is easy to obtain and the model is convenient to form, so that the shield tunnel segment obtained by processing and simulating the gypsum is relatively close to the original concrete segment in properties, and the gypsum is widely applied to concrete structure model tests.
However, in order to pursue economic benefits and face some difficulties in operation, most of the existing gypsum manufacturing moulds are simplified, and the manufactured and molded model is rough; due to the simplification of the structure and the rough forming, the test result has corresponding deviation, the real structure mechanical behavior result is difficult to obtain, and some problems occur in the practical engineering application; therefore, in order to obtain a more refined shield segment model, reasonably research the mechanical behavior characteristics of the shield tunnel structure under complex geological conditions, and solve the technical problems in the operation of preparing the refined gypsum shield segment model, a plaster shield segment model pouring mold with refined simulation and operability needs to be designed and manufactured for the experimental research of a physical model so as to provide guidance for actual engineering construction.
SUMMERY OF THE UTILITY MODEL
To the technical problem who exists among the prior art, the utility model provides a mould is pour to gypsum shield section of jurisdiction model to the gypsum model that the solution was made into of present mould is coarse and the structure deviation that leads to the simulation is great, is difficult to obtain the technical problem of true structure mechanics action result in the experiment.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
the utility model provides a gypsum shield segment model pouring mould, which comprises an upper cover plate, a lower cover plate, an inner mould, an outer mould and a cover plate fixing bolt, wherein the upper cover plate and the lower cover plate are arranged in parallel up and down; the inner mold and the outer mold are vertically fixed between the upper cover plate and the lower cover plate, the outer mold is sleeved outside the inner mold, the inner mold and the outer mold are arranged at intervals, and a gypsum pouring area is formed between the inner mold and the outer mold; the upper cover plate and the lower cover plate are fixedly connected together through a cover plate fixing bolt.
Further, the lower surface of the upper cover plate is provided with an upper cover plate inner mold bayonet and an upper cover plate outer mold bayonet, the upper end of the inner mold is fixedly clamped in the upper cover plate inner mold bayonet, and the upper end of the outer mold is fixedly clamped in the upper cover plate outer mold bayonet; the upper surface of the lower cover plate is provided with a lower cover plate inner mold bayonet and a lower cover plate outer mold bayonet, the lower end fixing clamp of the inner mold is arranged in the lower cover plate inner mold bayonet, and the lower end fixing clamp of the outer mold is arranged in the lower cover plate outer mold bayonet.
Furthermore, a plurality of exhaust holes are uniformly formed in the upper cover plate and are positioned right above the gypsum pouring area; one end of the exhaust hole is communicated with the gypsum pouring area, and the other end of the exhaust hole is communicated with the outside.
Furthermore, a plurality of positioning rod upper fixing holes are uniformly formed in the upper cover plate, and a plurality of positioning rod lower fixing holes are uniformly formed in the lower cover plate; the positioning rod upper fixing hole is positioned right above the gypsum pouring area, and the positioning rod lower fixing hole is positioned right below the gypsum pouring area; the positioning rod is arranged in the upper fixing hole of the positioning rod and the lower fixing hole of the positioning rod in a penetrating mode, one end of the positioning rod extends into the gypsum pouring area, and the other end of the positioning rod extends out of the upper cover plate or the lower cover plate.
Furthermore, the device also comprises an annular reinforcing bar; the annular reinforcing bar is arranged between the inner die and the outer die and is arranged in the middle of the gypsum pouring area; the annular reinforcing bars are formed by binding annular reinforcing bars and longitudinal reinforcing bars.
Furthermore, a plurality of slotted bars are arranged on the inner surface of the outer mold, and the arrangement form of the slotted bars is matched with the circumferential block joint of the shield segment of the prototype tunnel.
Further, the inner mold comprises a plurality of inner mold layer blocks, and the inner mold layer blocks are sequentially spliced along the axis direction of the inner mold and fixedly connected together through inner mold fixing bolts; the outer die comprises a plurality of outer die layer blocks which are sequentially spliced along the axis direction of the outer die and fixedly connected together through outer die fixing bolts.
Furthermore, the inner mold layer block and the outer mold layer block are made of PVC engineering plastics, and two adjacent inner mold layer blocks or two adjacent outer mold layer blocks are sealed and bonded by strong glue.
Further, the inner die comprises a plurality of inner die splicing blocks, the inner die splicing blocks are sequentially spliced along the circumferential direction of the inner die, and two adjacent inner die splicing blocks are sealed and fixed; the outer die comprises a plurality of outer die splicing blocks, the outer die splicing blocks are sequentially spliced along the circumferential direction of the outer die, and two adjacent outer die splicing blocks are sealed and fixed.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a gypsum shield segment model pouring mould, which is characterized in that an inner mould and an outer mould are arranged between an upper cover plate and a lower cover plate, a gypsum pouring area is formed between the inner mould and the outer mould, the upper cover plate and the lower cover plate are fixed by a cover plate fixing bolt, the forming of a gypsum shield segment model is ensured, and the fine simulation of a gypsum shield segment is realized, so that the mechanical behavior characteristics of the segment can be fully researched; the structure is fine, the operation is feasible, the test result can be real and reliable, the adjustment can be carried out according to the actual design, and effective guidance can be provided for the actual engineering construction.
Further, through set up interior outer mould bayonet socket on upper and lower apron, utilize interior outer mould bayonet socket to carry out accurate location fixed to centre form and external mold, ensured the dimension precision that the district was pour to the gypsum, and then guaranteed the accurate size of gypsum shield structure section of jurisdiction model.
Further, through setting up the exhaust hole on the upper cover plate, can reduce the gas pocket after the section of jurisdiction shaping with the gas outgoing in the gypsum mixture in the mould, prevent because the too much intensity that influences the section of jurisdiction model of inside gas pocket to the accuracy of later stage analogue test result has been guaranteed.
Further, through set up fixed orifices under the excellent fixed orifices or the locating bar on the apron from top to bottom respectively, alternate the locating bar on the locating bar in fixed orifices and the fixed orifices under the locating bar, carry out the hole site of cross section to the gypsum shield section of jurisdiction model of pouring and stereotype, the vertical connecting bolt hole of simulation prototype shield section of jurisdiction ensures that fashioned gypsum shield section of jurisdiction can carry out the model shield tunnel that vertical connection formed certain length, keeps unanimous with prototype shield tunnel connected mode.
Furthermore, by arranging the annular reinforcing bars in the gypsum pouring area and simulating the reinforcing bars in the prototype tunnel shield segment by using the annular reinforcing bars, the structural strength of the gypsum shield segment model is effectively improved, and the accuracy of a simulation test result is ensured; the annular reinforcing bars adopt a double-layer annular reinforcing bar structure, double-layer reinforcing bars of the prototype tunnel shield segment are simulated, and the gypsum shield segment model is more real.
Furthermore, the grooving strips are distributed on the inner surface of the outer mold, the distribution form of the grooving strips is matched with the circumferential block splicing of the prototype shield segment, the rigidity of the connecting part of the blocks is weakened by arranging the grooving strips, so that the bolt connection between the prototype shield segments is simulated, and the gypsum shield segment model is ensured to be closer to the real concrete shield segment.
Furthermore, the inner mold and the outer mold are arranged in a layered mode in the axial direction and fixed through fixing bolts matched in length, materials on each layer are prevented from being separated, the number of layers is changed conveniently according to the height of the designed inner mold layer block and outer mold layer block, the height of the inner mold and the outer mold is adjusted, the requirement for manufacturing gypsum shield segment models with different widths is met, and the application range is wide.
Furthermore, the inner die layer blocks and the outer die layer blocks are made of PVC engineering plastics, and the two adjacent inner die layer blocks or the two adjacent outer die layer blocks are bonded in a sealing mode through the super glue, so that the sealing connection between the inner die layer blocks or the outer die layer blocks is ensured, the slurry leakage in the gypsum slurry pouring process is avoided, the strength and the durability of the die are ensured, the die deformation is avoided, and the accuracy of the segment model is also improved.
Furthermore, the inner mold is combined by adopting a plurality of inner mold splicing blocks, the outer mold is combined by adopting a plurality of outer mold splicing blocks, and the radius size of a gypsum pouring area is adjusted by increasing or decreasing the number of the inner mold splicing blocks and the outer mold splicing blocks, so that the gypsum shield segment models with different radius sizes are manufactured; meanwhile, the inner mold and the outer mold are arranged in blocks, so that demolding is facilitated, the manufacturing process is simple, the integrity of the formed gypsum shield segment is ensured, and the damage to the gypsum model in the demolding process is avoided.
Furthermore, the fixing bolts with the matched lengths are arranged on the inner die and the outer die, so that the combined materials on each layer are prevented from being separated, the number of layers is conveniently increased according to the width of the designed segment, and the height of the die is adjusted.
Furthermore, through setting up fixing bolt at four corners and central part of upper and lower apron, screw up the fixed to upper and lower apron rapidly after pouring the completion, play the design effect to the section of jurisdiction in the mould, prevent simultaneously that the heat release expansion of the mixture of gypsum and water from leading to the apron skew.
To sum up, the utility model of the gypsum shield segment model pouring mold is characterized in that positioning rod fixing holes are arranged in the upper cover plate and the lower cover plate, and the inner surface of the outer mold is provided with a groove strip to simulate the circumferential bolts and the longitudinal bolts of the prototype tunnel shield segment; the purpose of adjusting the height of the die can be achieved by arranging the fixing bolts of the cross sections of the inner film and the outer film, and the size of the duct piece can be changed; double-layer reinforcing bars of a prototype shield segment are simulated by placing double-layer iron wire circular rings between the inner film and the outer film; the position is fixed by arranging the bolt between the upper cover plate and the lower cover plate, so that the forming of the gypsum shield segment is facilitated; the exhaust holes are formed in the upper cover plate, so that gas in the mixture is exhausted, the reduction of air holes in the formed pipe piece is facilitated, and the fine simulation of the gypsum shield pipe piece is realized; pouring die, can be used for carrying out indoor physical model test, the mechanical behavior characteristic of section of jurisdiction under the study complicated geological conditions improves the true reliability of test result, has higher using value to tunnel engineering scientific research field.
Drawings
Fig. 1 is a front view of a gypsum shield segment model casting mold of the present invention;
fig. 2 is a perspective view of the internal structure of the gypsum shield segment model casting mold of the present invention;
fig. 3 is a top view of the internal structure of the gypsum shield segment model casting mold of the present invention;
fig. 4 is a schematic structural view of an upper cover plate in the casting mold for a gypsum shield segment model of the present invention;
fig. 5 is a schematic structural view of a lower cover plate in the casting mold for a gypsum shield segment model of the present invention;
fig. 6 is a schematic structural view of an inner mold in the casting mold for a gypsum shield segment model of the present invention;
fig. 7 is a schematic structural view of an outer mold in the gypsum shield segment model casting mold of the present invention;
fig. 8 is a schematic view of an annular reinforcing bar structure in the casting mold for a gypsum shield segment model of the present invention;
fig. 9 is a schematic structural view of a cover plate fixing bolt in the gypsum shield segment model casting mold of the present invention;
fig. 10 is a schematic structural view of an inner mold or an outer mold fixing bolt in the casting mold according to the present invention;
fig. 11 is a schematic structural view of a positioning rod in the casting mold for a gypsum shield segment model of the present invention;
fig. 12 is the exhaust hole closing body in the gypsum shield segment model casting mold of the present invention.
The device comprises an upper cover plate 1, a lower cover plate 2, an inner mold 3, an outer mold 4, an annular reinforcing bar 5, a cover plate fixing bolt 6, a positioning rod 7, an inner mold fixing bolt 8 and an outer mold fixing bolt 9, wherein the upper cover plate, the lower cover plate, the inner mold and the outer mold are fixed through bolts; 11 positioning rod upper fixing holes, 12 upper cover plate fixing bolt holes, 13 upper cover plate inner mold bayonets, 14 upper cover plate outer mold bayonets, 15 exhaust holes and 16 exhaust hole closing bodies; 21 positioning rod lower fixing holes, 22 lower cover plate fixing bolt holes, 23 lower cover plate inner mold bayonets and 24 lower cover plate outer mold bayonets; 31 an inner mold closed block, 32 an inner mold adjacent block and 33 an inner mold standard block; 41 outer mold closing blocks, 42 outer mold adjacent blocks and 43 outer mold standard blocks; 401, grooving; 71 a first positioning bar and 72 a second positioning bar.
Detailed Description
In order to make the technical problem solved by the present invention, technical solution and beneficial effect are more clearly understood, and the following specific embodiments are right for the present invention to proceed further detailed description. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The utility model provides a gypsum shield segment model pouring mould, which comprises an upper cover plate 1, a lower cover plate 2, an inner mould 3, an outer mould 4, an annular reinforcing bar 5, a cover plate fixing bolt 6 and a plurality of positioning rods 7; the upper cover plate 1 and the lower cover plate 2 are arranged in parallel up and down, and the inner mold 3 and the outer mold 4 are vertically fixed between the upper cover plate 1 and the lower cover plate 2; the outer die 4 is sleeved on the outer side of the inner die 3, and the inner die 3 and the outer die 4 are arranged at intervals; a gypsum pouring area, namely a segment forming area, is formed between the inner die 3 and the outer die 4; placing the annular reinforcing bars 5 in a gypsum pouring area, pouring the prepared gypsum slurry in the gypsum pouring area, fixing the upper cover plate 1 and the lower cover plate 2 by using cover plate fixing bolts 6, inserting positioning rods 7, and demolding and maintaining after molding to obtain the gypsum shield segment model; an upper cover plate fixing bolt hole 12 is formed in the upper cover plate 1, a lower cover plate fixing bolt hole 22 is formed in the lower cover plate 2, the upper end of the cover plate fixing bolt 6 is connected with the upper cover plate fixing bolt hole 12, and the lower end of the cover plate fixing bolt is connected with the lower cover plate fixing bolt hole 22.
A plurality of positioning rod upper fixing holes 11 are uniformly formed in the upper cover plate 1, and the positioning rod upper fixing holes 11 are located in the middle part right above the gypsum pouring area; a plurality of positioning rod lower fixing holes 21 are uniformly formed in the lower cover plate 2, and the positioning rod lower fixing holes 21 are positioned right below the gypsum pouring area; the positioning rod 7 penetrates through the positioning rod upper fixing hole 11 and the positioning rod lower fixing hole 21, one end of the positioning rod 7 extends into the gypsum pouring area, and the other end of the positioning rod extends out of the upper cover plate 1 or the lower cover plate 2; the diameter of the positioning rod 7 is smaller than the diameter of the upper positioning rod fixing hole 11 or the lower positioning rod fixing hole 21; through setting up fixed orifices 11 on the locating rod on upper cover plate 1, set up fixed orifices 21 under the locating rod on apron 2 down, insert locating rod 7 respectively in fixed orifices 21 under fixed orifices 11 and the locating rod on the locating rod, utilize locating rod 7 to stereotype the cross section hole site of gypsum shield section of jurisdiction model, the vertical connecting bolt hole of simulation prototype tunnel shield section of jurisdiction ensures that fashioned gypsum shield section of jurisdiction model carries out vertical connection, forms the model shield tunnel of certain length.
The lower surface of the upper cover plate 1 is provided with an upper cover plate inner mold bayonet 13 and an upper cover plate outer mold bayonet 14, the upper end of the inner mold 3 is fixedly clamped in the upper cover plate inner mold bayonet 13, and the upper end of the outer mold 4 is fixedly clamped in the upper cover plate outer mold bayonet 14; the upper surface of the lower cover plate 2 is provided with a lower cover plate inner mold bayonet 23 and a lower cover plate outer mold bayonet 24, the lower end of the inner mold 3 is fixedly clamped in the lower cover plate inner mold bayonet 23, and the lower end of the outer mold 4 is fixedly clamped in the lower cover plate outer mold bayonet 24; through set up interior outer mould bayonet socket on apron from top to bottom, it is fixed to utilize interior outer mould bayonet socket to carry out accurate location to centre form and external mold, has ensured the dimensional accuracy in gypsum pouring district, and then has guaranteed the accurate size of gypsum shield tunnel segment model.
A plurality of exhaust holes 15 are uniformly formed in the upper cover plate 1, the exhaust holes 15 are positioned right above the gypsum pouring area, one end of each exhaust hole 15 is communicated with the gypsum pouring area, and the other end of each exhaust hole 15 is communicated with the outside; a vent hole closing body 16 is arranged in the vent hole 15, a through hole is arranged in the middle of the vent hole closing body 16, and the positioning rod 7 is inserted in the vent hole closing body 16 through the through hole; through set up the exhaust hole on the upper cover plate, utilize the exhaust hole can be with pouring the gas outgoing in the gypsum thick liquids in the district is pour to the gypsum, reduce the gas pocket in the fashioned gypsum shield section of jurisdiction model, avoided because the inside gas pocket of gypsum shield section of jurisdiction model is too much, influence model intensity, ensured the accuracy of analogue test result.
The annular reinforcing bar 5 is arranged between the inner mold 3 and the outer mold 4 and is arranged in the middle of the gypsum pouring area, and the diameter of the annular reinforcing bar 5 is larger than the outer diameter of the inner mold 3 and smaller than the inner diameter of the outer mold 4; the annular reinforcing bars 5 adopt double-layer annular reinforcing bars, and each layer of annular reinforcing bars is formed by binding annular reinforcing bars with preset diameter and longitudinal reinforcing bars; set up annular arrangement of reinforcement 5 through pouring the district at the gypsum, utilize annular arrangement of reinforcement 5 to simulate the reinforcing bar in the prototype tunnel shield section of jurisdiction, can effectively improve the structural strength of gypsum shield section of jurisdiction model.
The inner surface of the outer mold 4 is provided with a plurality of slotted bars 401, and the arrangement form of the slotted bars 401 is matched with the circumferential block joint of the shield segment of the prototype tunnel; the arrangement form of the slotted bars is consistent with the block splicing form of the shield segment of the prototype tunnel, the rigidity of the connecting part of the blocks is weakened through the slotted bars, so that the bolt connection between the blocks of the shield segment of the prototype tunnel is simulated, and the condition that a gypsum shield segment model is closer to a real concrete shield segment is ensured.
The inner mold 3 comprises a plurality of inner mold layer blocks which are sequentially spliced along the axis direction of the inner mold and fixedly connected together through inner mold fixing bolts 8; the outer die 4 comprises a plurality of outer die layer blocks which are sequentially spliced along the axis direction of the outer die and fixedly connected together through outer die fixing bolts 9; the inner mold 3 and the outer mold 4 are arranged in a layered mode in the axis direction and are fixed through fixing bolts with matched lengths, the number of layers is changed conveniently according to the designed heights of the inner mold layer block and the outer mold layer block, the heights of the inner mold and the outer mold are adjusted, the requirement for manufacturing gypsum shield segment models with different widths is met, and the application range is wide; preferably, the inner mold layer blocks and the outer mold layer blocks are made of PVC engineering plastics, and two adjacent inner mold layer blocks or two adjacent outer mold layer blocks are sealed and bonded by strong glue, so that the inner mold layer blocks or the outer mold layer blocks are sealed and connected, and the slurry leakage in the gypsum slurry pouring process is avoided; the inner mold and the outer mold are made of PVC engineering plastic with high cost performance, the required strength and durability can be guaranteed, the mold deformation is avoided, and the accuracy of the segment model is improved.
The inner die 3 comprises a plurality of inner die splicing blocks which are sequentially spliced along the circumferential direction of the inner die, and two adjacent inner die splicing blocks are sealed and fixed; the outer die 4 comprises a plurality of outer die splicing blocks, the outer die splicing blocks are sequentially spliced along the circumferential direction of the outer die, and two adjacent outer die splicing blocks are sealed and fixed; the inner mold 3 is combined by adopting a plurality of inner mold splicing blocks, the outer mold 4 is combined by adopting a plurality of outer mold splicing blocks, the radius size of a gypsum pouring area is adjusted by increasing or decreasing the number of the inner mold splicing blocks and the outer mold splicing blocks, and then the gypsum shield segment models with different radius sizes are manufactured; meanwhile, the inner mold and the outer mold are arranged in a blocking mode, demolding is facilitated, the manufacturing process is simple, the integrity of the formed gypsum shield segment is guaranteed, and the damage to the model in the demolding process is avoided.
A method for pouring a gypsum shield segment model comprises the following steps:
step 4, after the gypsum slurry is poured, mounting an upper cover plate at the upper ends of the inner mold and the outer mold, fixing the upper cover plate and the lower cover plate together by using a cover plate fixing bolt, inserting a positioning rod at the upper part, and sealing the exhaust hole;
and 5, demolding and maintaining to obtain the gypsum shield segment model.
The utility model relates to a gypsum shield segment model pouring mould, which adopts the technical scheme that positioning rod fixing holes are arranged in an upper cover plate and a lower cover plate, and a groove strip is arranged on the inner surface of an outer mould to simulate a circumferential bolt and a longitudinal bolt of a prototype tunnel shield segment; the inner die and the outer die are arranged in a layered mode and are fixed through the fixing bolts, and the purpose of adjusting the height of the pouring die is achieved; the inner die and the outer die are arranged in a partitioning manner in the circumferential direction, so that the adjustment of the radius size of the die is realized, and the adjustment of the height and the radius size of a gypsum shield segment model is further realized; the annular reinforcing bars are arranged between the inner die and the outer die, so that the reinforcing bars in the shield segments of the prototype tunnel are simulated; the upper cover plate is connected with the lower cover plate through the fixing bolts, and the gypsum slurry is fixed through the fixing bolts immediately after pouring is finished, so that a gypsum shield segment model is easy to form; the exhaust holes are formed in the upper cover plate, so that gas in the poured gypsum slurry is exhausted, the reduction of air holes in the formed segment is facilitated, the fine simulation manufacturing of a segment model of the gypsum shield is realized, and the mechanical behavior characteristics of the segment model are fully researched; the structure is meticulous, and the operation is feasible, can make the test result true and reliable to can adjust size structure according to actual design, can provide effective guidance for actual engineering construction.
Examples
As shown in fig. 1-12, the embodiment provides a casting mold for a gypsum shield segment model, which includes an upper cover plate 1, a lower cover plate 2, an inner mold 3, an outer mold 4, an annular reinforcing bar 5, a cover plate fixing bolt 6 and a plurality of positioning rods 7; the upper cover plate 1 and the lower cover plate 2 are arranged in parallel up and down, the inner mold 3 and the outer mold 4 are both vertically fixed between the upper cover plate 1 and the lower cover plate 2, the outer mold 4 is sleeved outside the inner mold 3, and the inner mold 3 and the outer mold 4 are arranged at intervals; a gypsum pouring area is formed between the inner die 3 and the outer die 4.
The upper cover plate 1 is provided with a plurality of positioning rod upper fixing holes 11, upper cover plate fixing bolt holes 12, an upper cover plate inner mold bayonet 13, an upper cover plate outer mold bayonet 14, exhaust holes 15 and an exhaust hole closing body 16; the lower cover plate 2 is provided with a plurality of positioning rod lower fixing holes 21, lower cover plate fixing bolt holes 22, a lower cover plate inner mold bayonet 23 and a lower cover plate outer mold bayonet 24.
The upper cover plate 1 and the lower cover plate 2 are both rectangular or square plates with the thickness of 2-4cm, and round openings are formed in the centers of the rectangular or square plates; the upper cover plate inner mold bayonet 13 and the upper cover plate outer mold bayonet 14 are both arranged on the lower surface of the upper cover plate 1, and the upper cover plate outer mold bayonet 14 is sleeved on the outer side of the upper cover plate inner mold bayonet 13; the lower cover plate inner mold bayonet 23 and the lower cover plate outer mold bayonet 24 are both arranged on the lower surface of the lower cover plate 2, and the lower cover plate outer mold bayonet 24 is sleeved on the outer side of the lower cover plate inner mold bayonet 23; the upper end of the inner mold 3 is clamped in the upper cover plate inner mold bayonet 13, and the lower end of the inner mold 3 is clamped in the lower cover plate inner mold bayonet 23; the upper end of the outer die 4 is clamped in the upper cover plate outer die bayonet 14, and the lower end of the outer die 4 is clamped in the lower cover plate outer die bayonet 24; the annular reinforcing bars 5 are arranged in a gypsum pouring area between the inner die 3 and the outer die 4, and the annular reinforcing bars 5 are double-layer iron wire circular rings.
The double-layer iron wire circular ring is woven by adopting an annular iron wire and a longitudinal iron wire, and the diameters of the annular iron wire and the longitudinal iron wire are different; the diameter of the circular iron wire is larger than the outer diameter of the inner die and smaller than the inner diameter of the outer die, and the circular iron wire can be placed in the middle of a space formed by the inner film and the outer film.
The plurality of positioning rod upper fixing holes 11 are uniformly arranged in the middle between the upper cover plate inner mold bayonet 13 and the upper cover plate outer mold bayonet 14, are annularly arranged at preset included angles at equal intervals and penetrate through the upper cover plate 1; the lower fixing holes 21 of the positioning rods are uniformly arranged in the middle between the bayonet 23 of the inner die of the lower cover plate and the bayonet 24 of the outer die of the lower cover plate, are annularly arranged at preset included angles at equal intervals and penetrate through the lower cover plate 2, and 16 fixing holes of the positioning rods are respectively arranged on the upper cover plate 1 and the lower cover plate 2; wherein, the positions of the fixed holes on the 3 positioning rods on the upper cover plate 1 are replaced by exhaust holes 15, and the three exhaust holes 15 are arranged at an included angle of 120 degrees; a vent closure 16 is disposed in the vent 15, which can close the vent 15 after the gypsum slurry is poured.
The positioning rod 7 comprises a first positioning rod 71 and a second positioning rod 72, and the first positioning rod 71 penetrates through the exhaust hole closing body 16 and then extends into the gypsum pouring area; the second positioning rod 72 respectively penetrates through the upper positioning rod fixing hole or the lower positioning rod fixing hole and then extends into the gypsum pouring area; the insertion depth of the first positioning rod 71 and the second positioning rod 72 can be adjusted according to actual design, and the first positioning rod and the second positioning rod are used for simulating and positioning the holes of the cross section connecting holes of the cast gypsum shield segment model; preferably, the first positioning rod 71 and the second positioning rod 72 are both positioning steel rods, and the outer surfaces of the positioning steel rods are uniformly coated with a lubricant or a release agent.
The first positioning rod 71 is positioned in the exhaust hole closing body 16, the total number of the first positioning rod 71 is 3, and the length of the first positioning rod 71 comprises the depth of inserting the gypsum shield segment model, the height of the exhaust hole closing body and the reserved part of the outer side; the second positioning rods 72 are positioned in the rest hole positions of the lower cover plate and the upper cover plate except the exhaust holes, and the total number is 29; the length of the second positioning rod 72 comprises the depth of insertion into the gypsum shield segment model, the thickness of the upper cover plate or the lower cover plate and the outer reserved part.
The peripheral corners and the central part of the upper cover plate 1 are provided with upper cover plate fixing bolt holes 12, and the peripheral corners and the central part of the lower cover plate 2 are provided with lower cover plate fixing bolt holes 22; the upper end of the cover plate fixing bolt 6 penetrates through the upper cover plate fixing bolt hole 12, and the upper end of the cover plate fixing bolt 6 is fixedly connected with the upper cover plate 1 through a nut; the lower end of the cover plate fixing bolt 6 is arranged in the lower cover plate fixing bolt hole 22 in a penetrating mode, and the lower end of the cover plate fixing bolt 6 is fixedly connected with the lower cover plate 2 through a nut; the upper cover plate 1 is fixedly connected with the lower cover plate 2 through the cover plate fixing bolt 6, so that the inner mold 3 and the outer mold 4 are accurately positioned, and the mold forming is fixed.
In the embodiment, in the vertical direction, the inner mold 3 comprises a plurality of inner mold blocks, and the inner mold blocks are sequentially spliced along the axis direction of the inner mold and fixedly connected together through inner mold fixing bolts 8; the outer die 4 comprises a plurality of outer die layer blocks which are sequentially spliced along the axis direction of the outer die and fixedly connected together through outer die fixing bolts 9; the inner mold layer block or the outer mold layer block is made of PVC engineering plastics with the width of 3-5cm and the height of each layer of PVC engineering plastics of 2-4cm, a plurality of layers of PVC engineering plastic circular rings are vertically overlapped and combined, the height formed by combining the plurality of layers of PVC engineering plastics can be adjusted according to design, each layer of PVC engineering plastics is bonded by strong glue, and vertically arranged inner mold fixing bolts and outer mold fixing bolts are respectively and cooperatively fixed, the lengths of the inner mold fixing bolts and the outer mold fixing bolts are respectively matched with the axial heights of the inner mold and the outer mold and are slightly lower than the combined height; the inner mold 3 and the outer mold 4 are arranged in a layered mode in the axis direction and are fixed through fixing bolts matched in length, the number of layers is increased conveniently according to the designed height of the inner mold layer block or the outer mold layer block, the height of the inner mold and the outer mold is adjusted, the requirement for manufacturing gypsum shield segment models with different lengths is met, and the application range is wide; meanwhile, the sealing connection between the inner mold layer block and the outer mold layer block is ensured, slurry leakage in the gypsum slurry pouring process is avoided, and the accuracy of the gypsum shield segment model is improved; the inner mold and the outer mold are made of PVC engineering plastic with high cost performance, the required strength and durability can be guaranteed, the deformation of the mold is avoided, and the accuracy of the segment model is improved.
In the embodiment, in the circumferential direction, the inner mold 3 comprises a plurality of inner mold splicing blocks, the inner mold splicing blocks are sequentially spliced along the circumferential direction of the inner mold, and the splicing seams between two adjacent inner mold splicing blocks are sealed and fixed; the outer die 4 comprises a plurality of outer die splicing blocks which are sequentially spliced along the circumferential direction of the outer die, and the splicing seams between two adjacent outer die splicing blocks are sealed and fixed; the inner die 3 is combined by adopting a plurality of inner die splicing blocks, the outer die 4 is combined by adopting a plurality of outer die splicing blocks, and the radius size of a gypsum pouring area is adjusted by increasing or decreasing the number of the inner die splicing blocks and the outer die splicing blocks, so that the gypsum shield segment models with different radius sizes are manufactured; meanwhile, the inner mold and the outer mold are arranged in blocks, so that demolding is facilitated, the manufacturing process is simple, the integrity of the formed gypsum shield segment is ensured, and the damage to the model in the demolding process is avoided; the inner membrane splicing blocks or the outer membrane splicing blocks are respectively obtained by vertically dividing the inner membrane 3 or the outer membrane 4 in the circumferential direction, wherein the inner membrane 3 comprises an inner membrane sealing block 31, an inner membrane abutting block 32 and an inner membrane standard block 33; the outer die 4 comprises an outer die closing block 41, an outer die abutting block 42 and an outer die standard block 43; and the central angles corresponding to the closed block, the adjacent block and the standard block are basically consistent with the central angle of the annular block of the shield segment of the prototype.
The inner surface of the outer mold 4 is provided with a plurality of slotted bars 401, and the positions and the arrangement modes of the slotted bars are consistent with the positions and the arrangement modes of the circumferential block joints of the prototype shield segment.
The central angle corresponding to the width of the grooving strip 401 is 3-5 degrees, and the thickness of the grooving strip is determined according to the following formula:
(EI+kL)bh′3-6kIαh′-6D2kIα＝0
the EI is the bending rigidity of the transverse section of the segment ring; i is the transverse section moment of inertia of the segment ring; k is the rigidity of the segment ring longitudinal seam joint; l is the length of the joint curved beam; b is the longitudinal width of the segment ring; h' is the thickness of the grooving section; alpha is the central angle of the tube sheet ring corresponding to the slotting section; d2Is the inner diameter of the tube sheet ring.
The pouring method of the gypsum shield segment model in the embodiment comprises the following steps:
And 3, selecting the diameter of the iron wire according to a material test, weaving the iron wire into a double-layer iron wire circular ring with a proper size, putting the double-layer iron wire circular ring between the inner mold and the outer mold, stirring and fully mixing the gypsum and the water according to the ratio of the gypsum to the water determined by the proportioning test to obtain gypsum slurry, and pouring the gypsum slurry into a gypsum pouring area to ensure that the gypsum slurry slightly submerges the top surfaces of the inner mold and the outer mold.
Step 4, rapidly covering the upper cover plate which is brushed with a release agent or a lubricant in advance above the inner mold and the outer mold, enabling the inner mold and the outer mold to correspond to the bayonet of the inner mold of the upper cover plate and the bayonet of the outer mold of the upper cover plate, pressing the upper cover plate, enabling gypsum slurry in a gypsum pouring area to overflow through the exhaust holes and the upper fixing holes of the positioning rods, and immediately screwing and fixing the upper cover plate and the lower cover plate by adopting cover plate fixing bolts; and a positioning steel bar is inserted into a fixing hole on the positioning bar of the upper cover plate, and then the exhaust hole sealing body is adopted to seal the exhaust hole seal.
And 6, cleaning the casting mold, assembling again, and then starting the next casting of the gypsum shield segment.
Taking a gypsum shield segment model with the thickness of 3cm, the outer diameter of 52cm, the inner diameter of 46cm and the width of 12.5cm as an example:
when the pouring mold is adopted for manufacturing, the upper cover plate and the lower cover plate are square plates with the thickness of 2.5cm, a round opening in the middle and the size of 80cm multiplied by 80 cm; 3 exhaust holes are arranged on the upper cover plate at intervals of 120 degrees and are distributed annularly, and an exhaust hole closing body is adopted to close the exhaust holes after pouring is finished.
The inner membrane bayonet and the outer membrane bayonet are located on the inner sides of the upper cover plate and the lower cover plate, the depths of the inner membrane bayonet and the outer membrane bayonet are 0.5cm, the inner membrane and the outer membrane bayonet are respectively arranged in the inner membrane bayonet and the outer membrane bayonet of the upper cover plate and the lower cover plate to form a circular gypsum pouring area with the width of 3cm, the outer diameter of 52cm and the inner diameter of 46cm, and a double-layer iron wire circular ring with the diameter of about 49cm is placed in the gypsum pouring area to prepare the gypsum shield segment model.
The upper fixing hole and the lower fixing hole of the positioning rod are respectively arranged between the inner mold bayonet and the outer mold bayonet of the upper cover plate and the lower cover plate, are annularly arranged at equal intervals at a 22.5-degree central angle and penetrate through the upper cover plate and the lower cover plate, and the upper cover plate and the lower cover plate are respectively provided with 16 positioning holes; the peripheral corners and the central positions of the upper cover plate and the lower cover plate are respectively provided with 12 cover plate fixing bolt holes in total; the upper cover plate and the lower cover plate are accurately positioned and fixed through bolt holes by adopting cover plate fixing bolts.
The inner mold and the outer mold are vertically overlapped and combined by 3 layers of PVC engineering plastic circular rings with the thickness of 3cm and the height of 4.5cm, strong glue is adopted for bonding the layers of materials, and an inner mold fixing bolt and an outer mold fixing bolt which are vertically arranged and have the height slightly smaller than 13cm are cooperatively fixed.
The combined inner mold and the outer mold are respectively vertically divided into a closed block, two adjacent blocks and three standard blocks at central angles of 20 degrees, 68.75 degrees and 67.5 degrees; the inner surface of the outer die is provided with six grooving strips, the central angle corresponding to the width of each grooving strip is 4 degrees, the thickness of each grooving strip is 12mm, the central angle corresponding to the interval of each grooving strip is 20 degrees of the outer die sealing block, and the outer die adjacent block is 68.75 degrees and the outer die standard block is 67.5 degrees; two external mold closed blocks are arranged in a splayed shape, the external mold adjacent blocks are respectively vertically arranged, and the other two external mold closed blocks are vertically arranged on the external mold standard blocks.
The first positioning rod is positioned in the exhaust hole sealing module, the depth of the first positioning rod inserted into the duct piece is 2cm, and the total length of the first positioning rod is more than 8 cm; the second positioning rod is positioned in the lower cover plate and the other positioning rod fixing holes of the upper cover plate except the exhaust hole, the depth of the second positioning rod inserted into the duct piece is 2cm, and the total length of the second positioning rod is larger than 6 cm.
The utility model discloses a gypsum shield segment model pouring mould, which is characterized in that positioning rod fixing holes are arranged in an upper cover plate and a lower cover plate, and a groove is arranged on the inner surface of an outer mould, so as to simulate the circumferential bolt and the longitudinal bolt of a prototype tunnel shield segment; the number of the layer blocks of the inner and outer membranes is changed by arranging the inner and outer membrane fixing bolts with the cross sections of the inner and outer membranes so as to achieve the purpose of adjusting the height of the mould, and the size of the duct piece can be changed by matching with the adjustment of the inner and outer mould splicing blocks; double-layer reinforcing bars of a prototype shield segment are simulated by placing double-layer iron wire circular rings between the inner film and the outer film; the position is fixed by arranging the cover plate fixing bolt between the upper cover plate and the lower cover plate, so that the forming of the gypsum shield segment is facilitated; the exhaust holes are formed in the upper cover plate, so that gas in gypsum slurry is exhausted, the reduction of air holes in the formed segment is facilitated, and the fine simulation of a gypsum shield segment model is realized; the utility model discloses the gypsum shield constructs section of jurisdiction model of preparation can be used for carrying out the indoor physical model experiment, and the mechanical behavior characteristic of section of jurisdiction under the intensive study complex geological conditions improves the true reliability of test result, has higher using value to tunnel engineering scientific research field.
The above embodiment is only one of the embodiments that can realize the technical solution of the present invention, and the scope of the present invention is not limited only by the embodiment, but also includes any variations, substitutions and other embodiments that can be easily conceived by those skilled in the art within the technical scope of the present invention.
Claims (9)
1. A gypsum shield segment model pouring mold is characterized by comprising an upper cover plate (1), a lower cover plate (2), an inner mold (3), an outer mold (4) and a cover plate fixing bolt (6), wherein the upper cover plate (1) and the lower cover plate (2) are arranged in parallel up and down; the inner mold (3) and the outer mold (4) are both vertically fixed between the upper cover plate (1) and the lower cover plate (2), the outer mold (4) is sleeved on the outer side of the inner mold (3), the inner mold (3) and the outer mold (4) are arranged at intervals, and a gypsum pouring area is formed between the inner mold (3) and the outer mold (4); the upper cover plate (1) and the lower cover plate (2) are fixedly connected together through a cover plate fixing bolt (6).
2. The gypsum shield segment model pouring mold as claimed in claim 1, wherein the lower surface of the upper cover plate (1) is provided with an upper cover plate inner mold bayonet (13) and an upper cover plate outer mold bayonet (14), the upper end of the inner mold (3) is fixedly clamped in the upper cover plate inner mold bayonet (13), and the upper end of the outer mold (4) is fixedly clamped in the upper cover plate outer mold bayonet (14); the upper surface of the lower cover plate (2) is provided with a lower cover plate inner mold bayonet (23) and a lower cover plate outer mold bayonet (24), the lower end of the inner mold (3) is fixedly clamped in the lower cover plate inner mold bayonet (23), and the lower end of the outer mold (4) is fixedly clamped in the lower cover plate outer mold bayonet (24).
3. The gypsum shield segment model casting mold according to claim 1, wherein a plurality of exhaust holes (15) are uniformly formed in the upper cover plate (1), and the exhaust holes (15) are positioned right above a gypsum casting area; one end of the exhaust hole (15) is communicated with the gypsum pouring area, the other end of the exhaust hole is communicated with the outside, and an exhaust hole closing body (16) is arranged in the exhaust hole (15).
4. The gypsum shield segment model casting mold according to claim 1, wherein a plurality of positioning rod upper fixing holes (11) are uniformly formed in the upper cover plate (1), and a plurality of positioning rod lower fixing holes (21) are uniformly formed in the lower cover plate (2); the positioning rod upper fixing hole (11) is positioned right above the gypsum pouring area, and the positioning rod lower fixing hole (21) is positioned right below the gypsum pouring area; all wear to be equipped with location stick (7) in fixed orifices (21) under last fixed orifices (11) of location stick and the location stick, during the gypsum poured the district, the other end stretched out upper cover plate (1) or lower apron (2) in the one end of location stick (7).
5. The gypsum shield segment model casting mold according to claim 1, further comprising an annular reinforcing bar (5); the annular reinforcing bar (5) is arranged between the inner die (3) and the outer die (4) and is arranged in the middle of the gypsum pouring area; the annular reinforcing bars (5) are double-layer annular reinforcing bars, and each layer of annular reinforcing bars are formed by binding annular reinforcing bars and longitudinal reinforcing bars.
6. The gypsum shield segment model casting mold according to claim 1, wherein the inner surface of the outer mold (4) is provided with a plurality of grooving strips (401).
7. The gypsum shield segment model pouring mold according to claim 1, wherein the inner mold (3) comprises a plurality of inner mold blocks, and the inner mold blocks are sequentially spliced along the axis direction of the inner mold and fixedly connected together through inner mold fixing bolts (8); the outer die (4) comprises a plurality of outer die layer blocks which are sequentially spliced along the axis direction of the outer die and fixedly connected together through outer die fixing bolts (9).
8. The gypsum shield segment model casting mold as claimed in claim 7, wherein the inner mold layer block and the outer mold layer block are made of PVC engineering plastics, and two adjacent inner mold layer blocks or two adjacent outer mold layer blocks are sealed and bonded by super glue.
9. The gypsum shield segment model pouring mold according to claim 1, wherein the inner mold (3) comprises a plurality of inner mold splicing blocks, the inner mold splicing blocks are sequentially spliced along the circumferential direction of the inner mold, and two adjacent inner mold splicing blocks are sealed and fixed; the outer die (4) comprises a plurality of outer die splicing blocks, the outer die splicing blocks are sequentially spliced along the circumferential direction of the outer die, and two adjacent outer die splicing blocks are sealed and fixed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120187475.1U CN215150318U (en) | 2021-01-22 | 2021-01-22 | Gypsum shield constructs section of jurisdiction model and pours mould |
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| CN202120187475.1U CN215150318U (en) | 2021-01-22 | 2021-01-22 | Gypsum shield constructs section of jurisdiction model and pours mould |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112757473A (en) * | 2021-01-22 | 2021-05-07 | 长安大学 | Gypsum shield segment model casting mold and casting method |
| CN114851363A (en) * | 2022-04-15 | 2022-08-05 | 南昌轨道交通集团有限公司 | Mold for manufacturing rectangular highway tunnel plaster model and manufacturing method thereof |
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2021
- 2021-01-22 CN CN202120187475.1U patent/CN215150318U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112757473A (en) * | 2021-01-22 | 2021-05-07 | 长安大学 | Gypsum shield segment model casting mold and casting method |
| CN112757473B (en) * | 2021-01-22 | 2024-08-20 | 长安大学 | Gypsum shield segment model pouring mold and pouring method |
| CN114851363A (en) * | 2022-04-15 | 2022-08-05 | 南昌轨道交通集团有限公司 | Mold for manufacturing rectangular highway tunnel plaster model and manufacturing method thereof |
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