Box culvert tensioning construction method and construction structure

Abstract

The invention relates to the field of civil construction, in particular to a box culvert tensioning construction method which comprises the steps that S1, a sinking groove is formed in the position, corresponding to the side edge of a box culvert, of the top face of a cushion layer; s2, a rolling supporting assembly is arranged in the sinking groove, wherein the rolling supporting assembly comprises a supporting part and a ball arranged at the top of the supporting part; s3, the box culvert is hoisted to a preset position, and a preset distance is kept between the box culvert and the placed box culvert in the longitudinal direction of the box culvert; s4, transversely adjusting the box culvert to enable the box culvert to correspond to the lofting mark; and S5, tensioning operation is conducted, when the longitudinal movement distance of the box culvert reaches a preset position h1, the offset distance h2 between the tail end of the box culvert and the lofting mark is judged, and when h2 is larger than or equal to a set threshold value, the box culvert is transversely pushed till h2 is smaller than the set threshold value. The invention further provides a tensioning construction structure, the box culvert can be supported by arranging the balls capable of descending, the adjusting method in the box culvert tensioning process is optimized, and the existing problems are effectively solved.

Description

Technical Field

[0001] The invention relates to the field of civil construction, and in particular to a box culvert tensioning construction method and a construction structure. Background Art

[0002] Prefabricated box culverts are a common form of underground pipe gallery, widely used in the construction of underground pipelines such as rainwater, electricity, heating, and gas. At present, one form of box culvert is to set a socket at the head end and a socket at the tail end, and connect them by tensioning steel strands during installation. Specifically, as shown in a box culvert connection construction process disclosed in the application number 201710252935.2, after the newly placed box culvert is hoisted on the concrete cushion, the position of the newly placed box culvert is preliminarily adjusted by setting out the control line, and then the box culvert is connected by tensioning the steel strands.

[0003] At present, the existing box culvert tensioning construction method has the following problems: since a certain assembly gap is reserved between the spigot and the socket, the tail end of the box culvert is prone to dislocation due to the displacement of the head end in the assembly gap during the tensioning process, and then the tail end of the box culvert is prone to deviate from the preset position by a large amplitude, so it is sometimes necessary to withdraw and reinstall or use a jack to push the tail end of the box culvert. Since the friction between the box culvert and the cushion layer is large, once the socket and the spigot are inserted and matched, it is difficult to control the distance of the box culvert when it is pushed hard by the jack, and it is easy to damage the spigot and the socket.

[0004] The comparative document discloses a solution in the form of a locator, which is roughly a plate-like structure on the side of the box culvert. The installation of the locator increases the resistance to the tensioning of the box culvert, and when the box culvert sends a lateral deviation, the plate-like structure is subjected to a large lateral force. Therefore, high requirements are placed on the installation stability, structural stability, and installation position accuracy of the locator. The locator is difficult to provide precise positioning, and when the locator provides a large lateral restraint force to the box culvert, lateral stress accumulation is likely to occur at the box culvert plug-in position. After the locator is removed, the box culvert is prone to release lateral stress during subsequent installation disturbances, causing the box culvert to deviate or the waterproof structure at the box culvert plug-in position to become unstable.

[0005] Based on this, the applicant proposed a box culvert tensioning construction method and construction structure to solve the problems existing in the prior art. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a box culvert tensioning construction method and construction structure, which can support the box culvert by setting a descending ball, optimize the adjustment method of the box culvert tensioning process, and effectively solve the existing problems.

[0007] In order to solve the above problems, the present invention provides a box culvert tensioning construction method, comprising: S1, cushion layer construction, marking the side edge position corresponding to the preset position of the box culvert on the cushion layer surface, forming a sink groove extending laterally along the box culvert at the top surface of the cushion layer at the position corresponding to the side edge of the box culvert, one end of the sink groove extends into the inner side of the box culvert and the other end extends out of the outer side of the box culvert, and the sink groove is arranged at the tail end of the preset position of the box culvert; S2. Arrange a rolling support assembly in the sink, the rolling support assembly includes a support portion, a ball disposed on the top of the support portion, the ball extending out of the top surface of the cushion layer, and the height of the ball extending out of the top surface of the cushion layer is less than or equal to 3 mm, and the support portion can lower the ball to no higher than the top surface of the cushion layer; S3, hoisting the box culvert to the preset position, and making the box culvert maintain a pre-adjusted distance with the placed box culvert in its longitudinal direction; S4. Adjust the box culvert laterally so that the box culvert corresponds to the stakeout mark; S5. Arrange steel strands between the newly placed box culvert and the previously placed box culvert, and perform tensioning operations. When the box culvert moves longitudinally to the preset position h1, determine the offset distance h2 between the tail end of the box culvert and the layout mark. When h2 is greater than or equal to the set threshold, push the box culvert laterally until h2 is less than the set threshold, shrink the support part so that the box culvert is fully supported on the cushion layer, and continue the tensioning operation. h1 is greater than or equal to 2 cm and less than 3 cm.

[0008] Furthermore, S1 includes: setting trough layout areas at the head end and the tail end of the preset position of the box culvert respectively, the distance between the edge of the head end of the preset position of the box culvert and the corresponding trough layout area is greater than or equal to 10 cm and less than or equal to 30 cm, and the distance between the edge of the tail end of the preset position of the box culvert and the corresponding trough layout area is less than or equal to 20 cm.

[0009] Further, the S5 includes: During the tensioning operation, when the box culvert moves to the point where the head end contacts the tail end of the box culvert that has been placed in, it is determined whether they can be plugged in and matched. If they can be plugged in and matched, the tensioning operation is continued. If they cannot be plugged in and matched, the support part of the sinking groove arrangement area corresponding to the head end of the preset position of the box culvert is retracted.

[0010] Furthermore, before S5, the step further includes: A waterproof rubber strip is pasted on the tail end of the box culvert, and pressure sensors are installed on the waterproof rubber strips at the two sides of the box culvert; The S5 further includes: During the tensioning operation, before the box culvert moves longitudinally to the preset position h1, the value difference P1 of the pressure sensors on both sides of the box culvert is determined. When P1 is less than the set threshold, tensioning continues. When P1 is greater than the set threshold, tensioning is stopped and the box culvert is pushed to the side with the smaller pressure sensor value. When P1 is less than the set threshold, tensioning continues.

[0011] Furthermore, after S5, it also includes: S6. Take out the rolling support assembly and cast it in the sink for the second time to form a limiting part that abuts against the side of the box culvert.

[0012] Furthermore, S6 also includes: A limiting rib plate is placed in the sink, which includes a vertical plate abutting against the side of the box culvert and connecting ribs connected to the bottom of the vertical plate. The connecting ribs are located in the sink, and a vertical concrete body is formed on the side of the vertical plate away from the box culvert during pouring.

[0013] The present invention also provides a box culvert tensioning construction structure, comprising: Ball bearings; The support seat comprises a plurality of sub-seat bodies, wherein the top surface of the sub-seat body is provided with a plurality of arc grooves at intervals along the side extending in the length direction thereof, and one side of the arc grooves of two adjacent sub-seat bodies can be brought together to form a support block, and the arc grooves of the two sub-seat bodies of the same support block can jointly form a bowl-shaped structure for supporting a ball, and when the two sub-seat bodies of the same support block move away from each other, the ball can fall between the two sub-seat bodies; The limiting block can abut against the outermost sub-seat body of the support seat after the sub-seat body at one end of the support seat is abutted and limited, so as to stop the sub-seat body from moving in the direction toward the limiting block.

[0014] Furthermore, the construction structure also includes an insert block, which can be inserted into the side of the support block to stop the two sub-seat bodies of the support block from moving apart; The construction structure also has a driving part capable of moving the insert block toward the outside of the support block, so that when the insert block moves outward, the two sub-seat bodies of the same support block can move away from each other.

[0015] Furthermore, the driving unit is configured as follows: The insert block is configured to be wedge-shaped, and the side surface of the support block is provided with an inclined surface that matches the insert block; The construction structure comprises a support rod and a cushion block, wherein the support rod comprises a first rod segment and a second rod segment, wherein the first rod segment and the second rod segment are threadedly sleeved, and the first rod segment can abut against the plug block, and the other end of the first rod segment can abut against the cushion block; The construction structure also includes a main connecting rod, which is fixedly connected to each of the cushion blocks.

[0016] Furthermore, the insert block and the support rod are connected to the sub-seat bodies at corresponding positions via connecting ropes.

[0017] The beneficial effect of the present invention is that the box culvert can be supported by arranging a descending ball, the adjustment method of the box culvert tensioning process is optimized, and the existing problems are effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 This is a schematic diagram of the structure of a box culvert after a cushion layer is placed in an embodiment of the present invention.

[0019] Figure 2 for Figure 1 Top view of the illustrated embodiment.

[0020] Figure 3 for Figure 2 A structural schematic diagram of the partial box culvert connection process is shown.

[0021] Figure 4 for Figure 1 Schematic diagram of the local enlarged structure at point A in the middle.

[0022] Figure 5 for Figure 2 Schematic diagram of the local enlarged structure inside the middle sedimentation tank.

[0023] Figure 6 for Figure 1 A schematic diagram of the side structure of the support block in the illustrated embodiment.

[0024] Figure 7 for Figure 3 A schematic diagram of the local enlarged structure of point B in the illustrated embodiment.

[0025] Figure 8 for Figure 1 A schematic diagram of a partial side cross-sectional structure of the position of the limiting portion in the illustrated embodiment.

[0026] Among them: 1. cushion layer; 2. layout mark; 3. sink; 4. tail end; 5. head end; 6. ball bearing; 7. box culvert; 8. sink layout area; 9. waterproof rubber strip; 10. pressure sensor; 11. limit rib plate; 1101. vertical plate; 1102. connecting rib; 12. vertical concrete body; 13. sub-seat body; 14. arc groove; 15. limit block; 16. plug block; 17. support rod; 1701. first rod section; 1702. second rod section; 18. cushion block; 19. main connecting rod. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0028] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0029] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through an intermediate structure, but are only connected to form a whole through a connecting structure. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0031] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0032] In the present invention, if Figure 1-8 As shown, a box culvert tensioning construction method is provided, comprising: S1, the cushion layer 1 is constructed, a mark 2 is placed on the side edge position of the cushion layer 1 corresponding to the preset position of the box culvert 7, a sink 3 extending laterally along the box culvert 7 is formed on the top surface of the cushion layer 1 at the position corresponding to the side edge of the box culvert 7, one end of the sink 3 extends into the inner side of the box culvert 7, and the other end extends out of the box culvert 7, and the sink 3 is arranged at the tail end 4 of the preset position of the box culvert 7; When the construction method of the present invention is implemented, the sink 3 can be formed by inserting a template when the cushion layer 1 is scraped flat.

[0033] The marking mark 2 can be implemented by marking an elastic ink line on the top surface of the cushion layer 1.

[0034] S2, arrange the rolling support assembly in the sink 3, the rolling support assembly includes a support portion, a ball 6 arranged on the top of the support portion, the ball 6 extends out of the top surface of the cushion layer 1, and the height of the ball 6 extending out of the top surface of the cushion layer 1 is less than or equal to 3mm, and the support portion can make the top of the ball 6 not higher than the top surface of the cushion layer 1; The present invention can reduce the distance between the cushion layer 1 and the bottom of the box culvert 7 after the box culvert 7 is propped up by the balls 6 by controlling the extended height of the balls 6, so as to reduce the impact of the box culvert 7 on the cushion layer when the box culvert 7 is lowered, and can also reduce the overall inclination angle of the box culvert 7 relative to the cushion layer 1 when the tail end 4 of the newly placed box culvert 7 is supported and the head end 5 is supported on the cushion layer 1, so as to reduce the interference of the support of the balls 6 on the insertion and matching of the plug and socket of the box culvert 7.

[0035] S3, hoisting the box culvert 7 to a preset position, and making the box culvert 7 maintain a pre-adjusted distance with the placed box culvert in its longitudinal direction; S4, horizontally adjusting the box culvert 7 so that the box culvert 7 corresponds to the setting out mark 2; When the present invention is implemented, the initial position adjustment of the newly inserted box culvert 7 can be completed so that the box culvert 7 can be placed corresponding to the layout position. The present invention supports the box culvert 7 by arranging balls 6, thereby reducing the friction force that needs to be overcome for the lateral adjustment of the box culvert 7, and it is easy to achieve accurate adjustment of the position of the box culvert 7.

[0036] S5, arranging steel strands between the newly placed box culvert 7 and the previously placed box culvert 7, and performing tensioning operations. When the box culvert 7 moves longitudinally to a preset position h1, Figure 3 When the position is shown, the offset distance h2 between the tail end 4 of the box culvert 7 and the layout mark 2 is determined. When h2 is greater than or equal to the set threshold, Figure 3 As shown, the box culvert 7 is pushed laterally until h2 is less than the set threshold, the support portion is retracted so that the box culvert 7 is fully supported on the cushion layer 1, and the tensioning operation is continued, and h1 is greater than or equal to 2 cm and less than 3 cm.

[0037] In this way, after the head end 5 of the newly inserted box culvert 7 is inserted and matched with the tail end 4 of the already inserted box culvert 7 to a certain extent, the position of the tail end 4 of the box culvert 7 can be verified and represented by h2. When the value of h2 is not large, it can be regarded that the lateral position of the newly inserted box culvert 7 meets the expectations. At this time, the newly inserted box culvert 7 can be fixed by tensioning after the ball 6 falls. Since the stroke h1 of the newly inserted box culvert 7 is small at this time, the tail end 4 of the box culvert 7 is not easy to deviate significantly during the continued tensioning process. When the value of h2 is large, h2 can be adjusted by pushing the box culvert 7 laterally. In this process, the matching clearance between the newly inserted box culvert 7 and the already inserted box culvert 7 is utilized to adapt to the adjustment of the position of the newly inserted box culvert 7. When the steel strands are tensioned and tightened again after the oil cylinder is adjusted, the tail end 4 of the box culvert 7 has a certain activity space. Compared with the method of directly setting a positioner on the side of the box culvert 7, the positioner can avoid applying stress to the side of the box culvert 7. Then, when the newly inserted box culvert 7 is further connected with the already inserted box culvert 7, the small activity space of the tail end 4 of the newly inserted box culvert 7 can be used to release the lateral stress at the plug-in position of the box culvert 7, thereby further improving the installation stability of the box culvert 7.

[0038] Among them, the threshold value for judging h2 is set not to exceed 1cm.

[0039] The lateral adjustment of the box culvert 7 is preferred, which can be Figure 3 A transverse oil cylinder is arranged at the arrow position on the side of the box culvert 7, and the oil cylinder is fixed to the cushion layer 1 by expansion bolts to facilitate pushing the newly inserted box culvert 7.

[0040] The box culvert tensioning construction method of the present invention has the following technical advantages. First, by setting the ball 6, the position of the box culvert 7 can be conveniently adjusted after the box culvert 7 is hoisted into the site, so as to reduce the difficulty of adjusting the box culvert 7 and improve the adjustment accuracy of the box culvert 7; second, during the tensioning process, the movement resistance of the newly inserted box culvert 7 is reduced; third, after the newly inserted box culvert 7 is inserted and matched with the already inserted box culvert 7 to a certain extent, the position of the newly inserted box culvert 7 is re-checked and adjusted before continuing the tensioning, which can reduce the lateral stress at the plug-in position of the box culvert 7 on the basis of ensuring that the position of the tail end 4 of the newly inserted box culvert 7 meets the requirements, so as to improve the connection stability of the plug-in position after the box culvert 7 is installed.

[0041] In a preferred embodiment, the present invention is further optimized in that S1 includes: a trough arrangement area 8 is respectively set at the head end 5 and the tail end 4 of the preset position of the box culvert 7, and the distance between the edge of the head end 5 of the preset position of the box culvert 7 and the corresponding trough arrangement area 8 is greater than or equal to 10 cm and less than or equal to 30 cm, and the distance between the edge of the tail end 4 of the preset position of the box culvert 7 and the corresponding trough arrangement area 8 is less than or equal to 20 cm.

[0042] As shown in the figure, by setting the sink grooves 3 at the head end 5 and the tail end 4 of the box culvert 7 respectively, the box culvert 7 can be supported by the balls 6 as a whole at the initial stage of movement, so as to further facilitate the adjustment of the position of the box culvert 7.

[0043] In a preferred embodiment, the present invention is further optimized in that S5 includes: performing a tensioning operation, when the box culvert 7 moves to the point where the head end 5 contacts the tail end 4 that has been placed in the box culvert 7, determining whether they can be plugged in and matched; if they can be plugged in and matched, continuing the tensioning operation; if they cannot be plugged in and matched, contracting the support portion of the sink groove arrangement area 8 at the head end 5 at the preset position of the box culvert 7.

[0044] By such arrangement, under the working condition that the assembly clearance of the plug-in position between the box culverts 7 allows, the newly inserted box culvert 7 can be tensioned under the condition of being supported by the balls 6 as a whole, so as to facilitate the tensioning construction and the lateral adjustment of the box culvert 7. When the assembly clearance of the plug-in position between the box culverts 7 is not enough to allow the box culvert 7 to be inserted, the balls 6 in the sink arrangement area 8 at the head end 5 of the box culvert 7 can be dropped to lower the height of the head end 5 of the box culvert 7 to complete the insertion.

[0045] In a preferred embodiment, the present invention is further optimized in that before S5, the step further includes: like Figure 7 As shown ( Figure 7 for Figure 3 The partially enlarged cross-sectional view in the figure is used to facilitate the installation of the pressure sensor), a waterproof rubber strip 9 is pasted on the tail end 4 of the box culvert 7, and a pressure sensor 10 is set on the waterproof rubber strips 9 at the two side positions of the box culvert 7; The S5 further includes: During the tensioning operation, before the box culvert 7 moves longitudinally to the preset position h1, the value difference P1 of the pressure sensors 10 on both sides of the box culvert 7 is determined. When P1 is less than the set threshold, tensioning continues. When P1 is greater than the set threshold, tensioning is stopped and the box culvert 7 is pushed toward the side with the smaller value of the pressure sensor 10. When P1 is less than the set threshold, tensioning continues.

[0046] In this way, the excessive offset of the box culvert joint can be discovered in time during the tensioning movement, so that timely adjustments can be made.

[0047] In a preferred embodiment, the present invention is further optimized in that after S5, the following steps are further included: S6, taking out the rolling support assembly, and casting it a second time in the sink 3 to form a limiting portion abutting against the side of the box culvert 7.

[0048] Thus, after the box culvert 7 is tensioned, the limiting portion formed by the secondary casting limits the lateral position of the inserted box culvert 7, so as to prevent the tail end 4 of the inserted box culvert 7 from lateral displacement when the newly inserted box culvert 7 is tensioned again.

[0049] In a preferred embodiment, for the implementation of the present invention, further specifically, as shown in the figure, S6 also includes: A limiting rib plate 11 is placed in the trough 3. The limiting rib plate 11 includes a vertical plate 1101 abutting against the side of the box culvert 7 and a connecting rib 1102 connected to the bottom of the vertical plate 1101. The connecting rib 1102 is located in the trough 3. During pouring, a vertical concrete body 12 is formed on the side of the vertical plate 1101 away from the box culvert 7.

[0050] By using the vertical plate 1101 to abut against the side of the box culvert 7, the accurate fit and limitation of the limiting part and the box culvert 7 can be ensured, and a vertical concrete body is formed by the vertical plate 1101 away from the side of the box culvert 7, which can improve the limiting stability of the vertical plate 1101 on the box culvert 7.

[0051] It should be noted that the present invention provides a tensioning construction structure in the following embodiments to achieve the support and descent of the balls. This is not a limiting form of the support and descent of the balls in the above-mentioned tensioning construction method. In optional embodiments, technical personnel in this field can flexibly select existing support parts, such as support parts in the form of hydraulic cylinders, to control the descent of the balls through hydraulic pressure.

[0052] The present invention also provides a box culvert tensioning construction structure, comprising: a ball 6; a support seat, comprising a plurality of sub-seat bodies 13, the top surface of the sub-seat body 13 having a plurality of arc grooves 14 arranged at intervals along the side edges extending in the length direction thereof, and one side of the arc grooves 14 of two adjacent sub-seat bodies 13 can be brought together to form a support block, the arc grooves of the two sub-seat bodies 13 of the same support block can jointly form a bowl-shaped structure supporting the ball 6, and when the two sub-seat bodies 13 of the same support block move apart, the ball 6 can fall between the two sub-seat bodies 13; a limit block 15, which can abut against the outermost sub-seat body 13 of the support seat after the sub-seat body 13 at one end of the support seat is abutted and limited, so as to stop the sub-seat body 13 from moving in the direction toward the limit block 15.

[0053] When the construction structure provided by the present invention is applied to the above-mentioned construction method, in combination with the embodiment shown in the figure, after the cushion layer 1 is constructed, each sub-seat body 13 is placed in the sink 3 of the cushion layer 1, so that the sub-seat bodies 13 are combined in pairs to form support blocks, and each support block is arranged in sequence along the lateral direction of the box culvert 7, and the ball 6 is placed in each bowl-shaped structure, and the side of the outermost support block is abutted by the limit block 15, and the limit block 15 abuts against the side wall of the sink 3, and the connected support blocks are abutted and limited, so that each bowl-shaped structure can stably support the ball 6. After the box culvert 7 is placed on the cushion layer 1, the ball 6 supports the box culvert 7.

[0054] When it is necessary to lower the ball 6, the limit block 15 can be taken out from the sink 3 at the outer end of the box culvert 7. At this time, under the action of the pressure of the box culvert 7, the ball 6 provides a lateral movement force to the sub-seat body 13. After the sub-seat body 13 moves laterally, the ball 6 falls below the top surface of the cushion layer 1 to complete the descent of the box culvert 7.

[0055] The construction structure of the present invention has the following beneficial effects. First, the supporting state of the ball 6 is maintained by the lateral abutment between the sub-seat bodies 13 and the lateral restriction of the limit block 15, so that the ball 6 can stably provide supporting force to the box culvert 7 when supporting the box culvert 7; second, the support seat is assembled in a manner of the sub-seat body 13. After the limit block 15 is pulled out of the sink trough 3, the sub-seat body 13 and the ball 6 can be taken out in turn in the part of the sink trough 3 that leaks out of the outside of the box culvert 7. In this way, the support seat can be taken out under the condition that the space of the part of the sink trough 3 that leaks out of the box culvert 7 is small, and the distance between the sink trough 3 and the edge of the cushion layer 1 in the lateral direction of the cushion layer 1 can be increased, thereby reducing the influence of the sink trough 3 on the overall structure of the cushion layer 1; third, the support seat is directly supported by the ball 6, and the sub-seat body 13 is used to move horizontally to make the ball 6 descend, so that the entire ball 6 support structure is simple and easy to control the height, thereby reducing the requirement for the depth of the sink trough 3, and further reducing the influence of the sink trough 3 on the strength of the cushion layer 1.

[0056] In the embodiment of the present invention, in order to further reduce the resistance to the movement of the box culvert 7 , lubricating grease may be applied to the position of the ball 6 .

[0057] In order to facilitate the removal of the sub-seat bodies 13, the sub-seat bodies 13 can also be connected together in sequence through connecting ropes, so that the sub-seat bodies 13 can be pulled outward when the support seat is taken out.

[0058] In the illustrated embodiment, for the structure of the present invention, to be more specific, the construction structure also includes an insert block 16, which can be inserted into the side of the support block to stop the two sub-seat bodies 13 of the support block from moving apart; the construction structure also has a driving part that can move the insert block 16 toward the outside of the support block, so that the two sub-seat bodies 13 of the same support block can move apart when the insert block 16 moves outward.

[0059] As shown in the figure, when the ball 6 needs to be lowered, it is only necessary to move the insert block 16 outward from the support block position through the driving part, so that the sub-seat bodies 13 of each support block can move away from each other at the same time, and then each ball 6 can be roughly synchronously dropped, thereby avoiding damage to the ball 6 or the support seat or the culvert 7 caused by excessive local pressure on the ball 6 due to the asynchronous falling of the ball 6, and preventing the ball 6 and the support seat from getting stuck, so as to facilitate the removal of the ball 6 and the support seat.

[0060] In the illustrated embodiment, for the structure of the present invention, to be further specific, the driving portion is configured such that the plug block 16 is configured to be wedge-shaped, and the side surface of the support block is provided with an inclined surface that cooperates with the plug block 16; the construction structure includes a support rod 17 and a cushion block 18, and the support rod 17 includes a first rod segment 1701 and a second rod segment 1702, and the first rod segment 1701 and the second rod segment 1702 are threadedly connected, and the first rod segment 1701 can abut against the plug block 16, and the other end can abut against the cushion block 18; the construction structure also includes a main connecting rod 19, and the main connecting rod 19 is fixedly connected to each of the cushion blocks 18.

[0061] As shown in the figure, after the support seat and the limit block 15 are assembled in the sink 3, the adjacent support blocks can be supported by the insert block 16 to limit the movement of the sub-seat bodies 13 of the support blocks. When the ball 6 needs to be lowered, the main connecting rod 19 only needs to be pulled outward or pushed inward to drive the cushion block 18 to move and separate from the support rod 17, and the sub-seat body 13 generates a lateral force on the wedge surface of the insert block 16 to move the insert block 16 outward, and then the sub-seat body 13 of the support block can move away from each other to complete the lowering of the ball 6. When the support seat and the ball 6 are taken out, the column connecting rod and the cushion block 18 can be left in the sink 3.

[0062] During on-site assembly, the first rod segment 1701 and the second rod segment 1702 can be screwed together to adjust the support rod 17 and the cushion block 18 and the insert block 16 so as to improve the stability of the support block in supporting the ball 6.

[0063] In the specific installation process, each sub-seat body 13 can be placed in the sink 3, and then the cushion block 18, the support block and the plug block 16 are installed accordingly, and the limit block 15 is placed in the sink 3, so that the limit block 15 is in contact with the side of the outermost sub-block body. At this time, the first rod segment 1701 and the second rod segment 1702 are screwed together relatively, so that the support rod 17 is pressed against the plug block 16 and the cushion block 18. At this time, the main connecting rod 19 can be placed in the sink 3, and each cushion block 18 is spot welded and fixed to the main connecting rod 19. Through such an arrangement, the sub-seat body 13, the ball 6, the support rod 17 and the plug block 16 can be recycled and reused after use to reduce costs. The cushion block 18 and the main connecting rod 19 can be left in the sink 3. The materials of the cushion block 18 and the main connecting rod 19 are easy to obtain. The cushion block 18 can be directly processed by steel plate cutting waste and the main connecting rod 19 can be processed by steel bar processing waste.

[0064] In a preferred embodiment, in order to further facilitate the recovery of the plug block 16 and the support rod 17, a further optimized setting is that the plug block 16 and the support rod 17 are connected to the corresponding position of the sub-seat body 13 through a connecting rope. The connecting rope is not drawn in the drawings, and those skilled in the art can flexibly select existing cotton ropes as the connecting ropes for implementation.

[0065] The method of recovering the sub-seat body, the support rod and the insert block is not limited to the form of a connecting rope. In an optional embodiment, the recovery can also be carried out by pushing a magnet into a trough, adsorbing and dragging the magnet out.

[0066] exist Figure 1 In the embodiment shown, Figure 5 As shown, for the structure of the limit block 15, the preferred arrangement is that the limit block 15 includes a block body, a bolt seat connected to the top of the block body, and an abutment bolt threadedly screwed into the bolt seat. During installation, the block body abuts against the sub-seat body 13, and the bolt directly abuts against the side wall of the sink 3 or indirectly abuts against the groove wall of the sink 3 through a gasket.

[0067] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0068] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A box culvert tensioning construction method, characterized in that: include: S1. Construction of the cushion layer: marking the side edge position corresponding to the preset position of the box culvert on the cushion layer surface, forming a sink trough extending laterally along the box culvert at the corresponding side edge position of the box culvert on the cushion layer top surface, one end of the sink trough extends into the inner side of the box culvert and the other end extends out of the box culvert, and the sink trough is arranged at the tail end of the preset position of the box culvert; S2. Arrange a rolling support assembly in the sink, the rolling support assembly includes a support portion, a ball disposed on the top of the support portion, the ball extending out of the top surface of the cushion layer, and the height of the ball extending out of the top surface of the cushion layer is less than or equal to 3 mm, and the support portion can lower the ball to no higher than the top surface of the cushion layer; S3, hoisting the box culvert to the preset position, and making the box culvert maintain a pre-adjusted distance with the placed box culvert in its longitudinal direction; S4. Adjust the box culvert laterally so that the box culvert corresponds to the stakeout mark; S5. Arrange steel strands between the newly placed box culvert and the previously placed box culvert, and perform tensioning operations. When the box culvert moves longitudinally to the preset position h1, determine the offset distance h2 between the tail end of the box culvert and the layout mark. When h2 is greater than or equal to the set threshold, push the box culvert laterally until h2 is less than the set threshold, shrink the support part so that the box culvert is fully supported on the cushion layer, and continue the tensioning operation. h1 is greater than or equal to 2 cm and less than 3 cm.

2. A box culvert tensioning construction method according to claim 1, characterized in that: The S1 includes: setting sink trough arrangement areas at the head end and the tail end of the preset position of the box culvert respectively, the distance between the edge of the head end of the preset position of the box culvert and the corresponding sink trough arrangement area is greater than or equal to 10 cm and less than or equal to 30 cm, and the distance between the edge of the tail end of the preset position of the box culvert and the corresponding sink trough arrangement area is less than or equal to 20 cm.

3. A box culvert tensioning construction method according to claim 2, characterized in that: The S5 includes: During the tensioning operation, when the box culvert moves to the point where the head end contacts the tail end of the box culvert that has been placed in, it is determined whether they can be plugged in and matched. If they can be plugged in and matched, the tensioning operation is continued. If they cannot be plugged in and matched, the support part of the sinking groove arrangement area corresponding to the head end of the preset position of the box culvert is retracted.

4. A box culvert tensioning construction method according to claim 1, characterized in that: The S5 also includes: A waterproof rubber strip is pasted on the tail end of the box culvert, and pressure sensors are installed on the waterproof rubber strips at the two sides of the box culvert; The S5 further includes: During the tensioning operation, before the box culvert moves longitudinally to the preset position h1, the value difference P1 of the pressure sensors on both sides of the box culvert is determined. When P1 is less than the set threshold, tensioning continues. When P1 is greater than the set threshold, tensioning is stopped and the box culvert is pushed to the side with the smaller pressure sensor value. When P1 is less than the set threshold, tensioning continues.

5. A box culvert tensioning construction method and construction structure according to claim 1, characterized in that: After S5, it also includes: S6. Take out the rolling support assembly and cast it in the sink for the second time to form a limiting part that abuts against the side of the box culvert.

6. A box culvert tensioning construction method and construction structure according to claim 5, characterized in that: The S6 also includes: A limiting rib plate is placed in the sink, which includes a vertical plate abutting against the side of the box culvert and connecting ribs connected to the bottom of the vertical plate. The connecting ribs are located in the sink, and a vertical concrete body is formed on the side of the vertical plate away from the box culvert during pouring.

7. A box culvert tensioning construction structure, characterized in that: include: Ball bearings; The support seat comprises a plurality of sub-seat bodies, wherein the top surface of the sub-seat body is provided with a plurality of arc grooves at intervals along the side extending in the length direction thereof, and one side of the arc grooves of two adjacent sub-seat bodies can be brought together to form a support block, and the arc grooves of the two sub-seat bodies of the same support block can jointly form a bowl-shaped structure for supporting a ball, and when the two sub-seat bodies of the same support block move away from each other, the ball can fall between the two sub-seat bodies; The limiting block can abut against the outermost sub-seat body of the support seat after the sub-seat body at one end of the support seat is abutted and limited, so as to stop the sub-seat body from moving in the direction toward the limiting block.

8. A box culvert tensioning construction structure according to claim 7, characterized in that: The construction structure also includes an insert block, which can be inserted into the side of the support block to stop the two sub-seat bodies of the support block from moving apart; The construction structure also has a driving part capable of moving the insert block toward the outside of the support block, so that when the insert block moves outward, the two sub-seat bodies of the same support block can move away from each other.

9. A box culvert tensioning construction structure according to claim 8, characterized in that: The drive unit is configured such that The insert block is configured to be wedge-shaped, and the side surface of the support block is provided with an inclined surface that matches the insert block; The construction structure comprises a support rod and a cushion block, wherein the support rod comprises a first rod segment and a second rod segment, wherein the first rod segment and the second rod segment are threadedly sleeved, and the first rod segment can abut against the plug block, and the other end of the first rod segment can abut against the cushion block; The construction structure also includes a main connecting rod, which is fixedly connected to each of the cushion blocks.

10. A box culvert tensioning construction structure according to claim 9, characterized in that: The insert block and the support rod are connected to the sub-seat bodies at corresponding positions through a connecting rope.

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