Method for constructing heat pipe cover beam by using through rod

Abstract

The application relates to the technical field of a bent cap construction, in particular to a method for constructing a heat pipe bent cap by adopting a through core rod, which comprises through core rod installation, support platform erection, bent cap formwork installation, concrete pouring, curing and formwork dismantling; the through core rod installation is used for inserting the through core rod into a reserved hole arranged at the upper end of a pier column and making the two ends of the through core rod protrude from the reserved hole; the support platform erection is used for connecting a support platform to the through core rod and supporting the support platform through the through core rod; and the bent cap formwork installation is used for installing a bent cap formwork on the support platform. The application has the effects of facilitating the construction of the bent cap and reducing the construction difficulty.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of a bent cap construction, in particular to a method for constructing a heat pipe bent cap by using a through rod. BACKGROUND

[0002] The heat pipe is affected by laying conditions in the construction process and is selected to be laid overhead or underground, when the heat pipe is laid overhead, a support is needed, the support includes a pier column and a bent cap, the pier column is vertically arranged, and the bent cap is located at the upper end of the pier column. The bent cap can be constructed by using a cast-in-place method.

[0003] In the related art, a construction method of the bent cap is disclosed, which comprises the following steps: a support is erected by using a universal rod or a steel pipe, the lower part of the support is supported on the ground, the ground usually needs to be paved with a concrete floor to improve the support stability of the support, the support is erected to the same height as the pier column, a formwork for pouring the bent cap is installed at the upper end of the support, and the support needs to bear the weight of the concrete during pouring of the bent cap and transfer the weight to the ground.

[0004] However, the support needs to be erected higher for a higher pier column, and the construction difficulty is relatively large. SUMMARY

[0005] In order to facilitate the construction of the bent cap and reduce the construction difficulty, the application provides a method for constructing a heat pipe bent cap by using a through rod.

[0006] The application provides a method for constructing a heat pipe bent cap by using a through rod, which adopts the following technical scheme:

[0007] The method for constructing a heat pipe bent cap by using a through rod comprises the following steps: a through rod is installed, a support platform is erected, a bent cap formwork is installed, and concrete is poured and cured and the formwork is removed; the through rod is inserted into a reserved hole at the upper end of a pier column and the two ends of the through rod are extended out of the reserved hole, the support platform is connected to the through rod and supported by the through rod, and the bent cap formwork is installed on the support platform.

[0008] By adopting the above technical scheme, the through rod is inserted into the reserved hole at the upper end of the pier column and the two ends of the through rod are extended out of the reserved hole, then the support platform is connected to the through rod and supported by the through rod, and then the bent cap formwork is installed on the support platform, so that after the concrete is poured into the bent cap formwork, the weight of the bent cap is transferred to the through rod through the support platform and then to the pier column, thereby reducing the problem of large construction difficulty caused by the support platform erected from the ground, and facilitating the construction of the bent cap and reducing the construction difficulty.

[0009] Preferably, the through rod comprises a first plug, a second plug and a through shaft, one end of the first plug and the second plug is tapered, the through shaft penetrates the first plug and the second plug, and the first plug and the second plug are threadedly connected to the through shaft, and the tapered end of the first plug and the second plug is inserted into the reserved hole and can abut against the inner wall of the end of the reserved hole after rotating.

[0010] By adopting the above technical scheme, one end of the first plug and the second plug is tapered, the tapered end of the first plug and the second plug is inserted into the reserved hole, and the separate arrangement of the first plug and the second plug can reduce the length of the end penetrating into the reserved hole, so that the through rod can be more conveniently inserted into the reserved hole, and the taper can also guide the insertion of the first plug and the second plug, facilitating construction.

[0011] Preferably, the first plug and the second plug are provided with a plurality of supporting legs at one end located in the reserved hole, and a pushing device is arranged between the first plug and the second plug for driving the supporting legs to rotate, a placing groove for mounting the supporting legs is formed on the first plug and the second plug, one side wall of the placing groove is a vertical positioning surface, and the supporting legs are rotatably connected in the placing groove, and the pushing device rotates the supporting legs to abut against the vertical positioning surface to make one end of the supporting legs extending out of the placing groove abut against the inner wall of the reserved hole.

[0012] By adopting the above technical scheme, the supporting legs are rotatably connected in the placing groove, and when the first plug and the second plug are inserted into the reserved hole, the supporting legs are rotated to abut against the vertical positioning surface by the pushing device to improve the stability of the first plug and the second plug.

[0013] Preferably, the pushing device comprises two sleeves, a notch corresponding to the supporting leg is formed on one of the sleeves, the two sleeves are slidably connected and the sliding direction is parallel to the through shaft, and the two sleeves are threadedly connected to the through shaft, when the first plug or the second plug moves along the through shaft, the supporting leg corresponding to the notch enters the notch, and the two sleeves are rotated by the rotation of the first plug or the second plug, and the two sleeves move away from each other along the through shaft.

[0014] By adopting the above technical scheme, when the first plug or the second plug is rotated to enter the reserved hole, the supporting leg is gradually clamped into the notch, and the two sleeves move away from each other with the placement of the first plug or the second plug, so that the supporting leg is connected with the notch, and the supporting leg is rotated by the rotation of the first plug or the second plug.

[0015] Preferably, the through-core shaft includes a reverse threaded section, a same-direction threaded section and a polished rod section. The reverse threaded section has opposite thread rotation directions at both ends and is respectively connected to a same-direction threaded section. The same-direction threaded section is connected to the polished rod section at one end away from the reverse threaded section. The first plug and the second plug are first inserted along the polished rod section, and then the first plug and the second plug are connected to the corresponding same-direction threaded sections. The thread rotation directions of the two same-direction threaded sections are the same.

[0016] By adopting the above technical solution, the reverse thread section is used to be threadedly connected to the two sleeves, so that the two sleeves can move away from each other under the action of the reverse thread section, and the same-direction thread section is used to connect with the first plug and the second plug. When fixing the first plug and the second plug, rotating the through-shaft can keep the distance between the first plug and the second plug unchanged while reducing the distance between the two sleeves. The light rod section can be inserted into a section of the first plug or the second plug first, which facilitates the installation of the first plug and the second plug.

[0017] Preferably, the bracket platform includes a stool, an end plate is fixedly provided on the stool, and the ends of the first plug and the second plug are rotatably connected to a mounting plate, and the mounting plate is threadedly connected to the mounting bolt. When rotating the first plug and the second plug, first tighten the mounting bolt to abut against the first plug and the second plug, and then insert a rod between the mounting bolts and rotate it, and then pass the mounting bolt through the end plate and threadedly connect it to the mounting plate, and rotate the mounting plate so that the stool is set upward, and fix the direction of the stool by the mounting bolt.

[0018] By adopting the above technical solution, the mounting bolts are first connected to the mounting plate, so that a rod-shaped object is inserted between the mounting bolts to facilitate the rotation of the first plug and the second plug. At the same time, the mounting bolts can also pass through the end plate and then be connected to the mounting plate, so that the stool can remain in an upward position under the action of the mounting bolts.

[0019] Preferably, the support platform also includes a load-bearing beam and a distribution beam. The load-bearing beam is arranged horizontally and a jack is provided between the load-bearing beam and the bench. The distribution beam is hoisted on the upper surface of the load-bearing beam and the distribution beam is fixed to the load-bearing beam. Then, a steel plate is laid on the upper surface of the distribution beam.

[0020] By adopting the above technical solution, a jack is placed between the load-bearing beam and the stool. The jack is used to adjust the height of the load-bearing beam, thereby enabling the height of the cap beam template installed on the distribution beam to be adjusted.

[0021] Preferably, measurement and layout are required before the support platform is erected. The measurement and layout is used to measure the center position of the pier. The installation of the cap beam formwork includes first laying the bottom formwork of the cap beam formwork on the support platform, and measuring the edge line and main reinforcement position of the cap beam through the center position of the pier on the bottom plate; the steel bar skeleton inside the cap beam is processed on the ground and then hoisted onto the bottom formwork, and then the side formwork of the cap beam formwork is placed according to the edge line of the cap beam.

[0022] By adopting the technical scheme, the center position of the pier column is measured first, then the bottom die is laid on the support platform, the edge line of the bent cap and the position of the main reinforcement are measured according to the center position of the pier column on the bottom die, the steel reinforcement cage is hoisted to the bottom die, and the side die is placed according to the edge line of the bent cap, so that the center of the bent cap coincides with the center of the pier column, and the stability of the bent cap is improved.

[0023] Preferably, after the support platform is erected, a weight is placed on the support platform, and the distance change between the support platform and the mark made on the pier column is measured during the placement of the weight.

[0024] By adopting the technical scheme, after the support platform is erected, the weight is placed on the support platform first, and the deformation of the support platform is measured through the mark made on the pier column, so that the stability of the support platform when bearing the concrete is ensured.

[0025] Preferably, the concrete pouring and form removal include layer-by-layer pouring from top to bottom, continuous concrete pouring between layers, pouring of the upper layer of concrete is completed before the lower layer of concrete is initially cured, the side die of the bent cap formwork is removed after curing for not less than 7 days, and the bottom die of the bent cap formwork is removed after the concrete strength reaches 80%.

[0026] By adopting the technical scheme, the layered pouring of the bent cap can reduce the hollow inside the bent cap, and the side die of the bent cap formwork is removed after curing for 7 days, which can facilitate the curing of the whole bent cap.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. The support platform is supported by the through rod, and then the bent cap formwork is installed on the support platform, so that after the concrete is poured into the bent cap formwork, the weight of the bent cap is transmitted to the through rod through the support platform, and then to the pier column, thereby facilitating the construction of the bent cap and reducing the construction difficulty;

[0029] 2. After the first plug and the second plug enter the reserved hole, the stability of the first plug and the second plug can be improved by rotating the supporting leg to abut against the vertical positioning surface by the pushing device;

[0030] 3. The jack is placed between the bearing cross beam and the clamping stool, and the jack is used to adjust the height of the bearing cross beam, so that the height of the bent cap formwork installed on the distribution beam can be adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a schematic view of the installation structure of the through rod in the embodiment of the present application;

[0032] Figure 2 is a schematic diagram of the overall structure of the through rod in the embodiment of the present application;

[0033] Figure 3 is a schematic diagram of the structure of the through rod in the embodiment of the present application;

[0034] Figure 4 is a schematic diagram of the position of the bearing beam in the embodiment of the present application;

[0035] Figure 5 is a schematic diagram of the overall structure in the embodiment of the present application.

[0036] BRIEF DESCRIPTION OF DRAWINGS: 1, pier; 11, reserved hole; 2, through rod; 21, first plug; 22, second plug; 23, through shaft; 231, reverse threaded section; 232, same direction threaded section; 233, polished rod section; 3, annular pad; 4, pushing device; 41, sleeve; 411, notch; 412, sliding rod; 413, guide groove; 5, support leg; 51, placement groove; 511, vertical positioning surface; 52, containing groove; 6, clamping stool; 61, end plate; 62, mounting bolt; 63, mounting plate; 7, jack; 81, bearing beam; 82, distribution beam; 83, steel plate; 84, guardrail; 91, bottom mold; 92, side mold; 93, adjusting device. DETAILED DESCRIPTION

[0037] The following will be described in detail in combination with the accompanying drawings Figures 1-5 The present application will be further described in detail.

[0038] The embodiment of the present application discloses a method for constructing a heat pipe cover beam by using a through rod, which comprises the following steps: measuring and setting out, installing the through rod, erecting the support platform, installing the cover beam template, pouring and curing the concrete, and removing the formwork.

[0039] Reference Figure 1 The pier 1 is vertically arranged, the upper end of the pier 1 is used for constructing the cover beam, and the center of the cover beam needs to be coincided with the center of the pier 1, so as to improve the stability of the cover beam on the pier 1. The center position of the pier 1 is measured and set out, and the top surface of the pier 1 is marked.

[0040] Reference Figure 1The reserved hole 11 is horizontally arranged and penetrates the middle position of the pier column 1. The through rod 2 comprises a first plug 21, a second plug 22 and a through shaft 23. The first plug 21 and the second plug 22 are respectively arranged at two ends of the reserved hole 11, and the first plug 21 and the second plug 22 are connected in the reserved hole 11 through the through shaft 23. The first plug 21 and the second plug 22 are both tapered at one end and have a diameter larger than that of the reserved hole 11 at the other end. The center line of the through shaft 23 coincides with the center line of the first plug 21 and the second plug 22, so that the first plug 21 and the second plug 22 are both threadedly connected on the through shaft 23, and the threads at the threadedly connected positions of the first plug 21 and the second plug 22 and the through shaft 23 are arranged in the same direction. First, the tapered end of the first plug 21 is inserted into the reserved hole 11 from one end of the reserved hole 11, and then the through shaft 23 is inserted into the reserved hole 11 from the other end of the reserved hole 11 and is threadedly connected with the first plug 21. Then, the second plug 22 is connected to the through shaft 23, and the second plug 22 is rotated to move the second plug 22 relative to the through shaft 23 and to make the tapered end of the second plug 22 enter the reserved hole 11. As the through shaft 23 gradually enters the reserved hole 11, the side wall close to the larger end of the first plug 21 or the second plug 22 abuts against the edge of the reserved hole 11. Since the first plug 21 and the second plug 22 are both arranged to enter the reserved hole 11 from the smaller end, and the first plug 21 and the second plug 22 are arranged to enter the reserved hole 11 separately, the overall length can be reduced, and the installation is facilitated. In addition, since the first plug 21 and the second plug 22 can abut against the inner wall of the reserved hole 11 by the side wall, the first plug 21 and the second plug 22 can be connected stably in the reserved hole 11.

[0041] Reference Figure 1 and Figure 2In the process of installing the first plug 21 and the second plug 22, the annular gasket 3 is sleeved on the first plug 21 and the second plug 22, the annular gasket 3 is made of rubber material, and the annular gasket 3 can reduce the crack caused by the stress concentration of the first plug 21 and the second plug 22 on the edge of the reserved hole 11. The pushing device 4 is further arranged between the first plug 21 and the second plug 22, the support leg 5 is arranged at one end of the first plug 21 and the second plug 22 close to the pushing device 4, the support leg 5 is three on the first plug 21 or the second plug 22, and the three support legs 5 are circumferentially arranged on the first plug 21 and the second plug 22. Three placing grooves 51 for installing the support leg 5 are arranged on the side wall of the first plug 21 and the second plug 22, one side wall of the placing groove 51 is a vertical positioning face 511, the support leg 5 is rotationally connected in the placing groove 51, and when the support leg 5 abuts against the vertical positioning face 511, the end of the support leg 5 away from the first plug 21 and the second plug 22 abuts against the inner wall of the reserved hole 11. In the process of installing the first plug 21 and the second plug 22, the support leg 5 on the first plug 21 and the second plug 22 is rotated to the position of the vertical positioning face 511 under the action of the pushing device 4, and then the support leg 5 can provide the supporting force for the first plug 21 and the second plug 22, and the part of the first plug 21 and the second plug 22 outside the reserved hole 11 is subjected to the pressure, so that the bending deformation of the first plug 21 and the second plug 22 is reduced.

[0042] Reference Figure 2 and Figure 3The pushing device 4 comprises two sleeves 41, each of which is sleeved on the cross shaft 23 and has one end threadedly connected to the cross shaft 23. The cross shaft 23 comprises a reverse threaded section 231, two same-direction threaded sections 232 and a polished rod section 233. The reverse threaded section 231 is located in the middle, and each end of the reverse threaded section 231 has one same-direction threaded section 232. The same-direction threaded sections 232 are away from the reverse threaded section 231 and one end of the polished rod section 233. The threads at the two ends of the reverse threaded section 231 are opposite in rotation direction, and the opposite ends of the two sleeves 41 are threadedly connected to the two ends of the reverse threaded section 231, so that when the two sleeves 41 rotate relative to the cross shaft 23, the two sleeves 41 move towards or away from each other. A plurality of notches 411 are formed in one end of each sleeve 41, the notches 411 face away from the sleeve 41, and one side of the support leg 5 is used to abut against the bottom of the notch 411. The two sleeves 41 are slidably connected to each other. In this embodiment, a slide rod 412 is arranged on one sleeve 41, and a guide groove 413 is formed in the other sleeve 41, so that the slide rod 412 is slidably connected to the guide groove 413, and the length direction of the slide rod 412 is parallel to the center line of the cross shaft 23. When the first plug 21 and the second plug 22 move towards each other, the support leg 5 can be clamped into the notch 411 by rotating the cross shaft 23. When the support leg 5 is clamped into the notch 411, the cross shaft 23 is fixed, and when the first plug 21 or the second plug 22 is rotated, the two sleeves 41 are driven to rotate away from each other, so that the support leg 5 can be rotated to the position of the vertical positioning surface 511. If the support leg 5 is rotated to abut against the vertical positioning surface 511, the first plug 21 and the second plug 22 still do not abut against the end of the reserved hole 11. At this time, the first plug 21 and the second plug 22 are fixed to rotate the cross shaft 23, so that the two sleeves 41 move towards each other, and the first plug 21 and the second plug 22 can still move towards each other. The threads of the two same-direction threaded sections 232 are the same in rotation direction, so that when the first plug 21 and the second plug 22 are fixed, rotating the cross shaft 23 only causes the two sleeves 41 to move towards or away from each other. Then, the first plug 21 and the second plug 22 are separately rotated, and the first plug 21 and the second plug 22 abut against the end of the reserved hole 11.

[0043] Reference Figure 1 and Figure 4The bracket platform erection includes installing the clamping stool 6 on the first plug 21 and the second plug 22, the clamping stool 6 can be connected with the first plug 21 or the second plug 22 by welding, the clamping stools 6 connected with the two pier columns 1 installing the same cover beam can be welded and fixed by steel pipes to increase the stability of the clamping stool 6. The clamping stool 6 can be arranged in a U shape and buckled downward on the first plug 21 and the second plug 22, and then an end plate 61 is further fixedly arranged on the clamping stool 6, and the end plate 61 is located at the end position of the first plug 21 and the second plug 22. A mounting plate 63 is rotationally connected on the first plug 21 and the second plug 22, a plurality of mounting bolts 62 are threadedly connected on the mounting plate 63. An accommodating groove 52 is formed at one end of the first plug 21 and the second plug 22 located outside the reserved hole 11, the mounting plate 63 is located in the accommodating groove 52, and the rotation axis of the mounting plate 63 coincides with the center line of the first plug 21 and the second plug 22. The mounting bolts 62 penetrate through the mounting plate 63 and are used for abutting against the bottom of the accommodating groove 52. When the first plug 21 and the second plug 22 are rotated, the mounting bolts 62 can be first abutted against the bottom of the accommodating groove 52, a rod-shaped object is inserted into the position between the mounting bolts 62, the first plug 21 and the second plug 22 are rotated by using the rod-shaped object such as a steel pipe, which is more convenient. After the first plug 21 and the second plug 22 are installed to the position, the mounting bolts 62 are removed, the clamping stool 6 is placed on the first plug 21 and the second plug 22, the mounting bolts 62 penetrate through the end plate 61 and are threadedly connected with the mounting plate 63, the mounting plate 63 is rotated to make the middle position of the clamping stool 6 upward, and then the mounting bolts 62 are tightened, the mounting bolts 62 can abut against the bottom of the accommodating groove 52 to keep the stability of the clamping stool 6. The upper surface of the clamping stool 6 places the jack 7. Combined with the above description of the pier column 1, the bracket platform erection is completed. Figure 5 The bracket platform further includes a bearing cross beam 81 and a distribution beam 82, the bearing cross beam 81 is hoisted at the upper end of the jack 7, and a screw rod is installed between the two parallel bearing cross beams 81. The upper surface of the bearing cross beam 81 hoists the distribution beam 82, and the distribution beam 82 can be welded with the bearing cross beam 81. The upper surface of the distribution beam 82 is paved with a steel plate 83, the steel plate 83 is located at the position of the upper end of the pier column 1, and a protective fence 84 is installed on the upper surface of the steel plate 83 or the distribution beam 82, so as to provide a working space for the workers working on the bracket platform.

[0044] After the bracket platform is erected, the safety of the bracket platform needs to be checked, a mark is made on the pier column 1 directly below the cross bar 2, a heavy object such as a concrete block is hoisted on the upper surface of the steel plate 83 to pre-press the bracket platform, the weight of the heavy object is at least the total weight of the cover beam, and then the distance between the bracket platform and the mark is checked through the mark made on the pier column 1, so as to ensure the safety of the platform. In order to make the cover beam and the pier column 1 top combine closely, the top of the pier column 1 needs to be chiseled until the concrete aggregate is exposed, and then washed with water.

[0045] Reference Figure 5The cover beam formwork includes a bottom form 91 and a side form 92. The bottom form 91 is installed first. When the bottom form 91 is assembled, the gaps between adjacent bottom forms 91 should be tight to prevent concrete leakage during concrete pouring. After the installation of the bottom form 91, it is checked whether the elevation of the top surface of the bottom form 91 is equal to the designed elevation of the bottom of the cover beam. The surface of the bottom form 91 is polished and cleaned, and standard concrete pads are arranged in a plum blossom shape at intervals of 1 m. The edge line of the cover beam and the position of the main reinforcement are measured according to the center position of the pier column 1, and are marked on the bottom form 91. The reinforcement cage of the cover beam is processed on the ground and is directly hoisted on site. Then, other reinforcements are bound, and the embedded parts are installed. The side form 92 is placed according to the edge line of the cover beam on the bottom form 91, and the positions of the four intersection planes of the top surface of the cover beam are measured. The adjusting device 93 is installed outside the side form 92, and the side form 92 is adjusted through the adjusting device 93. The gap between the side form 92 and the bottom form 91 can be sealed by sticking adhesive tape, and the side forms 92 can be fixed by using opposite pull bolts. Finally, the elevation line of the top of the cover beam is projected onto the inner wall of the side form 92 to mark.

[0046] Concrete pouring and curing and form removal: Pump trucks are used for concrete pouring, and plug-in vibrators are used for vibration and compaction. The concrete is poured from top to bottom in layers, and each layer is not more than 30 cm. The concrete pouring between layers should be continuous. The upper layer of concrete pouring is completed before the initial setting or remolding of the lower layer of concrete. The pouring height of the concrete is controlled by the marked line on the inner wall of the side form 92. After the initial setting of the concrete, the concrete is covered with burlap or straw mats and is watered for maintenance. The maintenance time is not less than 7 days. When the strength of the concrete reaches 2.5 Mpa, the side form 92 is removed manually with the help of machinery. After the strength of the concrete reaches 80%, the bottom form 91 and the support platform and the through rod 2 are removed in turn.

[0047] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made on the basis of the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A method for constructing a thermal pipeline cap beam using a through-rod, characterized in that: The invention comprises the following steps: installing a through-rod, erecting a support platform, installing a cap beam template, pouring concrete, curing and removing the template; the through-rod installation is used to insert the through-rod (2) into a reserved hole (11) provided at the upper end of the pier column (1), and both ends of the through-rod (2) extend from the reserved hole (11); the support platform is used to connect the support platform to the through-rod (2) and support the support platform through the through-rod (2); the cap beam template is used to install the cap beam template on the support platform; The through-core rod (2) comprises a first plug (21), a second plug (22) and a through-core shaft (23), one end of each of the first plug (21) and the second plug (22) being tapered, the through-core shaft (23) passing through the first plug (21) and the second plug (22), and the first plug (21) and the second plug (22) being threadedly connected to the through-core shaft (23), the tapered end of each of the first plug (21) and the second plug (22) being inserted into the reserved hole (11) and being able to rotate so as to abut against the inner wall of the end of the reserved hole (11); A plurality of support legs (5) are provided at one end of the first plug (21) and the second plug (22) located in the reserved hole (11), and a pushing device (4) for driving the support legs (5) to rotate is provided between the first plug (21) and the second plug (22), a placement groove (51) for installing the support legs (5) is provided on the first plug (21) and the second plug (22), a side wall of the placement groove (51) is a vertical positioning surface (511), the support legs (5) are rotatably connected in the placement groove (51), and the pushing device (4) rotates the support legs (5) toward the vertical positioning surface (511) so that one end of the support legs (5) extending out of the placement groove (51) abuts against the inner wall of the reserved hole (11); The pushing device (4) includes two sleeves (41), one sleeve (41) is provided with a notch (411) corresponding to the support leg (5), the two sleeves (41) are slidably connected and the sliding direction is parallel to the through-core shaft (23), and the two sleeves (41) are both threadedly connected to the through-core shaft (23). When the first plug (21) or the second plug (22) moves along the through-core shaft (23), the support leg (5) corresponding to the notch (411) enters the notch (411), and the rotation of the first plug (21) or the second plug (22) simultaneously drives the two sleeves (41) to rotate, and the two sleeves (41) move away from each other along the through-core shaft (23).

2. The method for constructing a thermal pipeline cap beam using a through-rod according to claim 1, characterized in that: The through-core shaft (23) comprises a reverse thread segment (231), a same-direction thread segment (232) and a polished rod segment (233). The reverse thread segment (231) has two opposite thread rotation directions at both ends and is respectively connected to a same-direction thread segment (232). The same-direction thread segment (232) is connected to the polished rod segment (233) at one end away from the reverse thread segment (231). The first plug (21) and the second plug (22) are first inserted along the polished rod segment (233), and then the first plug (21) and the second plug (22) are connected to the corresponding same-direction thread segment (232). The thread rotation directions of the two same-direction thread segments (232) are the same.

3. The method for constructing a thermal pipeline cap beam using a through-rod according to claim 1, characterized in that: The support platform includes a stool (6), an end plate (61) is fixedly provided on the stool (6), and a mounting plate (63) is rotatably connected to the ends of the first plug (21) and the second plug (22), and a mounting bolt (62) is threadedly connected to the mounting plate (63). When the first plug (21) and the second plug (22) are rotated, the mounting bolt (62) is first tightened to abut against the first plug (21) and the second plug (22), and then a rod is inserted between the mounting bolts (62) and rotated, and then the mounting bolt (62) passes through the end plate (61) and is threadedly connected to the mounting plate (63), and the mounting plate (63) is rotated to set the stool (6) upward, and the orientation of the stool (6) is fixed by the mounting bolt (62).

4. The method for constructing a thermal pipeline cap beam using a through-rod according to claim 3, characterized in that: The support platform also includes a load-bearing beam (81) and a distribution beam (82), the load-bearing beam (81) is arranged horizontally and a jack (7) is arranged between the load-bearing beam (81) and the stool (6); the distribution beam (82) is hoisted on the upper surface of the load-bearing beam (81) and the distribution beam (82) is fixed to the load-bearing beam (81); and then a steel plate (83) is laid on the upper surface of the distribution beam (82).

5. The method for constructing a thermal pipeline cap beam using a mandrel according to claim 1, characterized in that: Before the support platform is erected, measurement and layout are required. The measurement and layout is used to measure the center position of the pier column (1). The installation of the cap beam template includes first laying the bottom template (91) of the cap beam template on the support platform, and measuring the edge line and main reinforcement position of the cap beam through the center position of the pier column (1) on the bottom plate; the steel bar skeleton inside the cap beam is processed on the ground and then hoisted onto the bottom template (91), and then the side template (92) of the cap beam template is placed according to the edge line of the cap beam.

6. The method for constructing a thermal pipeline cap beam using a mandrel according to claim 1, characterized in that: After the support platform is erected, a heavy object needs to be placed on the support platform. The pier (1) is first marked below the support platform. During the placement of the heavy object, the distance change between the support platform and the mark is measured.

7. The method for constructing a thermal pipeline cap beam using a through-rod according to claim 1, characterized in that: The concrete pouring, curing and formwork removal process includes pouring the concrete in layers from top to bottom, with the concrete pouring between layers being carried out continuously. The upper concrete pouring work is completed before the lower concrete begins to set. After pouring, the side formwork (92) of the cap beam formwork is removed after curing for no less than 7 days. After the concrete strength reaches 80%, the bottom formwork (91) of the cap beam formwork is removed.

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