Sedimentation post-cast strip pre-sealing structure and construction method thereof

Abstract

The invention discloses a settlement post-cast strip pre-sealing structure and a construction method thereof, and relates to the field of common building construction joints. A water stop ridge and a concrete top plate at the edge of a post-cast strip are integrally poured and formed; the prefabricated cover plate covers the top position of the post-cast strip, the splicing position of the prefabricated cover plate is arranged to be of a V-shaped structure, and fine aggregate concrete is poured; the pouring hole is formed by integrally pouring a steel pipe and the prefabricated cover plate; the temporary support is supported at the bottom of the concrete top plate at the edge of the post-cast strip; the multiple vertical rods are supported on the edges of the two sides of the post-cast strip formwork and the middle of the post-cast strip formwork respectively, a wireless pressure sensor is arranged on the vertical rod in the middle and used for collecting pressure values while supporting stress of the formwork, and the concrete pouring compactness is judged by comparing a theoretical calculation value with an actual pressure value. And in addition, fine aggregate concrete is filled between the splicing positions of the prefabricated cover plates and used for filling splicing seams, the prefabricated cover plates are connected into a whole, and the risk of water leakage or water seepage can be reduced.

Description

Technical Field

[0001] The invention relates to the field of general building structure joints, in particular to a settlement post-casting belt pre-enclosed structure and a construction method thereof. Background Art

[0002] With the intensive use of land resources in domestic urban construction, the demand for underground parking spaces is increasing. In order to meet the anti-floating requirements of the basement, the design institute requires that the precipitation work should not be stopped before the basement top slab is covered with soil, resulting in a long precipitation cycle and high cost for the basement. In order to save the project cost and meet the purpose of rapid construction of outdoor municipal and garden construction, the basement top slab has to be closed in advance before the settlement post-casting belt reaches the design closing conditions, which brings the following problems:

[0003] 1. The specification requires that the formwork support system at the settlement post-casting belt shall not be removed before the post-casting belt is closed. However, the traditional steel pipe fastener support system at the settlement post-casting belt cannot meet the cover load requirements;

[0004] 2. Use simple prefabricated cover plates to seal the post-settlement belt in advance, resulting in multiple water seepage paths and poor waterproofing effect;

[0005] 3. When the settlement post-casting zone is cast and sealed later, it is located below the covering soil and the concrete pouring situation cannot be directly understood, so the compactness cannot be guaranteed. Summary of the invention

[0006] The object of the present invention is to provide a pre-enclosed structure of a settlement post-casting zone and a construction method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a pre-enclosed structure of a post-casting zone for settlement, comprising:

[0008] The water stop is cast integrally with the concrete top slab at the edge of the post-cast strip;

[0009] The precast cover plate is covered on the top of the post-cast strip. The joint of the precast cover plate is set as a V-shaped structure and poured with fine stone concrete;

[0010] The casting hole is cast by integrally casting steel pipe and prefabricated cover plate;

[0011] Temporary supports to support the bottom of the concrete top slab at the edge of the post-cast strip;

[0012] Multiple vertical poles are respectively supported at the two side edges and the middle position of the post-cast strip formwork. A wireless pressure sensor is arranged on the middle vertical pole to collect pressure values ​​while supporting the formwork.

[0013] Preferably, the intersection of the prefabricated cover plate and the concrete top plate is set as an arc angle;

[0014] JS waterproof coating is applied between the prefabricated cover plate and the counter-sill of the water stop, and the gap is filled with foamed polyurethane.

[0015] Preferably, the prefabricated cover plate at the position of the post-cast zone uses the beam as the dividing line, and each plate is sloped at one thousandth according to the pouring direction. The spacing between the pouring holes is not greater than 2m, and the pouring holes are filled one by one in the direction from the outer wall to the inside of the basement.

[0016] Preferably, three rows of vertical poles are arranged, respectively located on both sides and in the middle of the post-casting strip formwork;

[0017] The vertical poles on both sides are used to support the two ends of the post-cast strip formwork, so that the post-cast strip forms a one-way plate stress;

[0018] A wireless pressure sensor is placed on the upper part of the middle vertical pole to collect pressure values ​​while supporting the formwork.

[0019] Preferably, a plurality of intermediate uprights are evenly arranged in the same casting strip template.

[0020] Preferably, a positioning device is provided between the vertical poles on both sides of the post-cast strip formwork and the middle vertical pole, for realizing position adjustment between the three vertical poles so that the middle vertical pole is located in the middle position of the vertical poles on both sides.

[0021] Preferably, the alignment device comprises:

[0022] A sliding seat, slidably mounted on the middle vertical pole;

[0023] Two gears meshing with each other, a first rotating shaft is fixedly installed at the axis of the gears, and the first rotating shaft is rotatably installed on both sides of the sliding seat;

[0024] Two swing rods, one end of which is fixedly connected to the first rotating shaft, and the other end of which is rotatably connected to the side vertical rod through a hinge support;

[0025] When the vertical poles on both sides move in the same direction, the two swinging rods rotate at the same angle under the meshing action of the gears to ensure that the middle vertical pole is in the middle position of the vertical poles on both sides.

[0026] Preferably, the centering device comprises:

[0027] The two ends of the telescopic rod are connected to the vertical poles on the side. The two ends of the telescopic rod are tied with pull ropes. The two ends of the pull rope are on the same horizontal line. A rolling roller is installed on the pull rope. A counterweight part is rotatably installed at the rotating shaft of the roller to provide downward gravity to the roller;

[0028] After the side poles are fixed at the edge of the post-casting strip formwork, the rollers will sag in the middle of the pull rope under the action of gravity, and the drooping part of the rollers will serve as a reference for installing the middle poles.

[0029] A settlement post-casting strip pre-sealing construction method adopts the settlement post-casting strip pre-sealing structure described above, comprising the following steps:

[0030] S1. Use a round steel pipe with a diameter of 150 and a wall thickness of 3mm as a temporary support for the post-casting strip;

[0031] S2. Set 50mm high water stop sills on both sides of the post-cast strip and cast it together with the post-cast strip of the basement concrete top slab. The casting holes are cast together with the prefabricated cover plate using steel pipes. Water stop rings are set at the same time. Arc angles are set on both sides of the intersection between the prefabricated cover plate and the basement, and waterproof membranes are laid;

[0032] A V-shaped joint is set at the joint of the prefabricated cover plate. After the joint is completed, fine stone concrete is poured to fill it. JS waterproof coating is applied between the prefabricated cover plate and the counter-sill, and foamed polyurethane is used to fill the gap.

[0033] S3. The concrete top slab of the basement at the location of the post-settlement pouring zone is divided by the beam, and each prefabricated cover plate is sloped at 1 / 1000 according to the pouring direction, and the distance between pouring holes is not more than 2m;

[0034] S4. The bottom formwork of the post-cast strip is supported by three rows of vertical poles. The vertical poles on both sides are used to support the two ends of the post-cast strip formwork, so that the post-cast strip forms a one-way plate stress form. A wireless pressure sensor is placed on the top of the middle vertical pole to collect pressure values ​​while serving as a template support stress;

[0035] S5. At the same time, a steel funnel is placed on the pouring holes, and the pouring holes are filled one by one from the outer wall to the inside of the basement. Self-compacting concrete is used.

[0036] Preferably, the pressure value F of the wireless pressure sensor is:

[0037]

[0038] Where q is the uniform load;

[0039] L is the distance between the middle pole support point and one of the side pole support points;

[0040] The actual pressure value measured by the wireless pressure sensor is compared with the theoretical value to determine the compactness of concrete pouring.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] The present invention provides a water stop sill and a prefabricated cover plate, uses fine stone concrete to fill the joints of the prefabricated cover plates, connects the prefabricated cover plates into a whole, lays waterproof membrane between the prefabricated cover plates and the concrete top plate, applies JS waterproof coating between the water stop sill and the prefabricated cover plates, and fills with foamed polyurethane, so as to improve the waterproof effect and reduce the risk of leakage or seepage.

[0043] By setting multiple vertical poles for the post-cast strip, a wireless pressure sensor is installed on the middle vertical pole to collect pressure values ​​while supporting the formwork. The density of concrete pouring is judged by comparing the theoretical calculated value with the actual pressure value. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A structural diagram of a post-casting strip reserved for the present invention;

[0045] Figure 2 This is a structural diagram of the splicing of the prefabricated cover plate of the present invention;

[0046] Figure 3 This is an overall structural diagram of Embodiment 1 of the present invention;

[0047] Figure 4 This is a slope direction diagram of the prefabricated cover plate of the present invention;

[0048] Figure 5 Calculating a width pattern for the present invention;

[0049] Figure 6 This is a diagram of a uniformly distributed load stress model of the present invention;

[0050] Figure 7 This is the shear force diagram of the support of the present invention;

[0051] Figure 8 This is a structural diagram of Embodiment 2 of the present invention;

[0052] Fig. 9 This is a structural diagram of an alignment device according to Embodiment 2 of the present invention;

[0053] Fig.10 This is a structural diagram of the sliding seat of the present invention;

[0054] Fig.11 It is a cross-sectional view of the alignment device of Example 4 of the present invention;

[0055] Fig.12 This is a structural diagram of an alignment device according to Embodiment 4 of the present invention;

[0056] Fig.13 This is a structural diagram of the alignment device of Example 5 of the present invention.

[0057] In the figure: 1. water stop; 2. prefabricated cover plate; 3. casting hole; 4. temporary support; 5. vertical pole; 6. wireless pressure sensor; 7. sliding seat; 8. support bar; 9. gear; 10. swing rod; 11. hinge support; 12. first rotating shaft; 13. telescopic rod; 14. connecting block; 15. pull rope; 16. roller; 17. counterweight part; 18. counterweight block; 19. positioning rod. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] Example 1

[0060] See also Figure 1 This embodiment provides a pre-enclosed structure of a settlement post-casting strip. Taking a basement as an example, it includes a concrete top plate d of a basement, on which a post-casting strip is reserved. A round steel pipe with a diameter of 150 mm and a thickness of 3 mm is used as a temporary support 4 for the basement concrete top plate d at the edge of the post-casting strip. A 50 mm high water stop 1 is set at the edge of the post-casting strip. Figure 1 As shown, the water stop 1 and the concrete top plate at the edge of the post-cast strip are cast in one piece.

[0061] like Figure 2 As shown, the prefabricated cover plate 2 is covered on the top of the post-casting strip, the joint of the prefabricated cover plate 2 is set as a V-shaped structure, and fine stone concrete is poured to connect the prefabricated cover plate 2 into a whole. A pouring hole 3 is opened on the prefabricated cover plate 2, and the pouring hole 3 is formed by integrally pouring a steel pipe with the prefabricated cover plate 2, and a circular water stop ring is set at the part of the prefabricated cover plate 2 that contacts the steel pipe.

[0062] An arc angle is set at the junction of the prefabricated cover plate 2 and the basement, and waterproof membrane c is laid on the prefabricated cover plate and the top of the basement. JS waterproof coating (i.e. polymer cement waterproof coating) is brushed between the prefabricated cover plate and the water stop sill, and foamed polyurethane is used to fill the gap. Then the soil can be backfilled on the top of the basement; after the waterproof coating, waterproof membrane and foamed polyurethane fill the gap, the sealing of the post-casting strip can be guaranteed, and the basement can be guaranteed not to leak or seep water, and the basement can be guaranteed to be dry.

[0063] The precast cover plate 2 at the post-casting zone is divided by the beam. Each plate is sloped at 1 / 1000 according to the pouring direction. The distance between the pouring holes 3 is not more than 2m. Figure 4 As shown by arrow A.

[0064] During construction, backfill soil is placed above the concrete top plate d of the basement to form a backfill soil layer a. The top of the steel pipe extends out from the backfill soil, and a steel cap is placed on the top of the steel pipe to close the steel pipe. The backfill soil cap can prevent soil from falling into the post-casting strip. When pouring concrete into the post-casting strip, you only need to remove the steel cap and insert a steel funnel into the top of the steel pipe to pour concrete. Since the diameter of the steel pipe is small, the top opening diameter of the funnel is larger than the diameter of the steel pipe, which is convenient for pouring concrete.

[0065] A plurality of vertical poles 5 are supported at the edges and the middle of the post-casting strip formwork. Figure 3 As shown, there are three rows of vertical poles 5, and the number of vertical poles in each row is set according to actual use requirements. The three rows of vertical poles 5 are respectively supported on both sides of the bottom of the post-casting strip formwork and in the middle. The specific arrangement is as follows: the vertical poles 5 on both sides are supported at the edge of the post-casting strip formwork, that is, supported at the position where the edge of the post-casting strip formwork contacts the basement concrete top plate, so that the post-casting strip forms a one-way plate force, such as Figure 3 As shown, the middle pole 5 is supported in the middle position of the post-casting strip formwork, and the distance between the middle pole 5 and the poles 5 on both sides is the same. A wireless pressure sensor 6 is placed on the upper part of the middle pole 5 to collect pressure values ​​while supporting the formwork. The density of concrete pouring can be judged by comparing the theoretical calculated value with the actual pressure value. At the same time, the middle poles are evenly arranged in the same slab span (no more than 450mm). Since the distance between the poles is consistent, the pressure value should be consistent in theory. Therefore, the density of concrete pouring can also be judged by the difference in the pressure values ​​of the poles in the same slab span, as shown in FIG. Figure 3 shown.

[0066] The specific construction method of this embodiment is as follows:

[0067] S1. Use a round steel pipe with a diameter of 150 and a wall thickness of 3 mm as a temporary support for the post-casting strip 4, such as Figure 1 As shown, the round steel pipe is supported on the concrete top plate of the basement and rests against the position of the concrete top plate near the post-casting strip, and installation space needs to be reserved for the upright rod 5. The spacing between the round steel pipes is not greater than 1.8m, and the post-casting strip formwork support frame can be removed in advance to ensure material turnover.

[0068] S2. Set 50mm high water stop on both sides of the post-casting strip and cast it together with the post-casting strip of the basement concrete top slab. Figure 1 As shown, the casting hole is formed by integrally casting a steel pipe and a prefabricated cover plate, and a water stop ring is provided at the same time. Arc corners are provided on both sides of the junction between the prefabricated cover plate and the basement, and waterproof membrane c is laid. The arc corners ensure the construction quality of the waterproof membrane; a waterproof protective layer b is formed on the upper part of the waterproof membrane c.

[0069] A V-shaped butt joint is set at the joint of the prefabricated cover plate 2. After the joint is completed, fine stone concrete is poured to fill it. JS waterproof coating (i.e. polymer cement waterproof coating) is applied between the prefabricated cover plate and the counter-sill, and foamed polyurethane is used to fill the gap;

[0070] S3. The concrete top slab of the basement at the location of the post-settlement belt is divided by the beam. Each prefabricated cover plate 2 is sloped at 1 / 1000 according to the pouring direction. The distance between the pouring holes is not more than 2m. Figure 4 As indicated by the arrow A;

[0071] S4. The bottom formwork of the post-cast strip is supported by three rows of vertical poles 5. The vertical poles on both sides are used to support the two ends of the post-cast strip formwork. The vertical poles on both sides are just at the edge of the post-cast strip, so that the post-cast strip forms a one-way plate stress form. A wireless pressure sensor 6 is placed on the upper part of the middle vertical pole to collect pressure values ​​while serving as a template support stress;

[0072] S5. Put a steel funnel on the pouring holes and pour the water into the holes one by one from the outer wall to the inside of the basement. Figure 4 As shown by the middle arrow B, the concrete is self-compacting concrete.

[0073] The density of concrete pouring can be judged by comparing the theoretical calculated value with the actual pressure value. At the same time, the middle vertical poles are evenly arranged in the same slab span (not exceeding 450mm). Since the vertical pole spacing is consistent, the pressure value should be consistent in theory. Therefore, the density of concrete pouring can also be judged by the difference in the pressure value of the vertical poles in the same slab span.

[0074] The specific judgment method is as follows: Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown in the figure, when designing the post-cast strip, the uniform load of the post-cast strip is a known design, and the calculation formula of the uniform load q is as follows:

[0075]

[0076] Where: t is the pouring thickness of the post-cast zone concrete;

[0077] b is the calculated width;

[0078] is the concrete bulk density;

[0079] The value of the calculated width b is a known value when designing the post-cast strip (see Figure 5 , generally the line connecting the center points of the vertical distance between two adjacent vertical poles and the middle pole is selected as the calculation width).

[0080] Then the pressure value F of the pressure sensor is:

[0081]

[0082] Where q is the uniform load;

[0083] L is the distance between the middle vertical pole support point and one of the side vertical pole support points, that is, L is half the width of the post-cast strip.

[0084] According to the above formula, the actual pressure value F measured by the wireless pressure sensor 6 can be compared with the theoretical value to determine the compactness of the concrete pouring.

[0085] Assuming that the theoretical uniform load is q1, the theoretical pressure value F1 is: By comparing the theoretical pressure value F1 with the actual pressure value F, if the actual pressure value F is greater than (or equal to) the theoretical pressure value F1, it indicates that the compactness of concrete pouring is higher than (or equal to) the theoretical design compactness, and the compactness of concrete pouring is good, meeting the design requirements; if the actual pressure value F is less than the theoretical pressure value F1, it indicates that the compactness of concrete pouring is lower than the theoretical design compactness, and does not meet the design requirements.

[0086] Through the above method, the compactness of concrete pouring can be determined to ensure that the concrete meets the design requirements, reduce water leakage or seepage caused by substandard concrete compactness in the post-casting zone, and ensure the dryness of the basement.

[0087] Example 2

[0088] During the actual construction, the applicant found that the position of the middle pole 5 has a great interference on the judgment of the compactness of the concrete pouring. It is mainly because the uniform load is equivalent to the concentrated load when calculating the uniform load, and the force point of the concentrated load is selected as the middle position of the post-cast strip. When collecting pressure, the middle pole 5 is also collected in the form of concentrated load. Therefore, how to better ensure that the middle pole 5 is in the middle position of the post-cast strip is a difficult problem. When erecting the pole 5, it is often necessary to find the middle position of the post-cast strip after measuring the width of the post-cast strip, and then erect the pole 5 after making a mark. The overall operation is relatively troublesome, and there will be large errors in the measurement. After the pole 5 is erected, it is necessary to measure the position of the pole 5 again to ensure that the pole 5 is in the middle position of the post-cast strip as much as possible to reduce the impact on the pressure value measured by the wireless pressure sensor 6.

[0089] To this end, the applicant also installed a positioning device on the vertical pole 5 to ensure that the distance between the middle vertical pole 5 and the vertical poles on both sides is the same (that is, it is located in the middle position of the vertical poles on both sides), and to ensure that the middle vertical pole 5 is exactly in the middle position of the post-casting strip. Figure 8 , Fig. 9 and Fig.10 As shown, the specific design of the alignment device is as follows:

[0090] The sliding seat 7 includes a sliding seat 7, which is slidably mounted on the middle vertical rod 5 and can slide up and down along the middle vertical rod 5. The two sides of the sliding seat 7 facing the vertical rods on both sides are fixedly mounted with support bars 8. The support bars 8 are rotatably mounted with a first rotating shaft 12. The diameter of the first rotating shaft 12 located between the support bars 8 is larger than the diameter of the two ends thereof. A gear 9 is fixedly mounted on one end of the first rotating shaft 12. Figure 8 and Fig. 9 As shown, two gears 9 are provided, symmetrically mounted on the sliding seat 7, and the two gears 9 are meshed together. A nut is installed at the other end of the first rotating shaft 12 through a thread, and when the nut is tightened, it can fit tightly with the support bar 8, clamping the support bar 8 between the first rotating shaft 12 and the nut, and the first rotating shaft 12 and the support bar 8 are fixed together by the nut, and the first rotating shaft 12 will not rotate, so that the position of the gear 9 can be fixed.

[0091] The two first rotating shafts 12 are also fixedly mounted with a swinging rod 10, one end of the swinging rod 10 is fixedly connected to the first rotating shaft 12, and the other end is rotatably mounted with a hinge support 11 through the rotating shaft, and the hinge support 11 is fixedly mounted on the side vertical rod 5, as shown in FIG. Figure 8 shown.

[0092] When determining the position of the middle vertical pole 5, it is necessary to determine the distance between the two side vertical poles 5, that is, the distance between the supporting ends of the two side vertical poles 5 is consistent with the width of the post-casting strip. The specific construction method of the vertical pole 5 is as follows:

[0093] Move the vertical poles 5 together to the bottom of the post-casting strip, and first adjust the distance between the vertical poles 5 on both sides according to the width of the post-casting strip. Place the vertical poles 5 on both sides on a horizontal pad, and keep the vertical poles on both sides in a vertical state, and pull the vertical poles 5 on both sides outward at the same time. When the vertical poles 5 on both sides move outward, they will swing the swing rods 10 outward and open. Since the ends of the two swing rods 10 that are close to each other are meshed together through the gear 9, the swing rods 10 swing outward at the same speed and angle. That is to say, in the process of the vertical poles 5 on both sides moving outward, the middle vertical pole 5 always remains in the middle position of the line connecting the vertical poles on both sides. When the distance between the vertical poles 5 on both sides is consistent with the width of the post-casting strip, stop pulling the vertical poles 5 outward. Then tighten the nut to fix the first rotating shaft 12 and the support bar 8 together, and the position between the three vertical poles 5 can be fixed.

[0094] After determining the positions of the three vertical poles 5, the vertical poles 5 on both sides can be pushed against the two ends of the post-cast strip template, the vertical poles 5 on both sides are just fixed at the edge of the post-cast strip, and then the middle vertical pole 5 can be pushed against the middle position of the post-cast strip template.

[0095] In this embodiment, when the vertical rods on both sides are pulled outward, the sliding seat 7 can slide up and down on the middle vertical rod 5, ensuring that there is no interference between the swing rod 10 and the vertical rod 5 when it is opened, ensuring that the vertical rod 5 can be at the same horizontal position.

[0096] During the whole process, it is only necessary to ensure that the distance between the two side posts 5 is consistent with the width of the post-cast strip. When determining the position of the middle post 5, it is not necessary to measure the position of the middle post 5 to the edge of the post-cast strip. It is possible to determine that the middle post 5 is in the middle of the post-cast strip, which makes it easier and more convenient to determine the position of the posts, greatly saving construction time. Moreover, the alignment device of the present application is applicable to post-cast strips of different widths.

[0097] Example 3

[0098] The difference from Example 2 is that when determining the position of the middle pole 5, the applicant also found that the position of the middle pole 5 can also be located by a simple pull rope. When using the pull rope for positioning, it is necessary to ensure that the two ends of the pull rope are on the same horizontal line.

[0099] The specific operation process is as follows: after the vertical poles 5 on both sides are placed on the edge of the post-casting strip formwork, the two ends of the pull rope are tied to the vertical poles 5 on both sides to keep the pull rope in a loose state, and then a heavy object is placed on the pull rope, and the heavy object can slide on the pull rope. When the heavy object straightens the pull rope under its own gravity, the position of the heavy object is the placement position of the middle vertical pole 5. In this embodiment, there is no need to measure the distance between the vertical poles 5 on both sides. A simple pull rope and a heavy object can be used as a positioning device for the middle vertical pole, which is more flexible to use and has higher adaptability.

[0100] Example 4

[0101] Based on Example 3, the applicant further optimized the scheme:

[0102] like Fig.11 and Fig.12 As shown, a slide groove is provided on the front or rear side of the vertical poles 5 on both sides. In this embodiment, the slide groove is provided on the front side of the vertical poles 5 on both sides as an example: a connecting block 14 is slidably installed in the slide groove, and a telescopic rod 13 is fixedly installed on the connecting block 14 of the vertical poles 5 on both sides, such as Fig.11 As shown, the telescopic rod 13 is made of aluminum alloy, and its structural design is similar to that of a fishing rod, which will not be described in detail here. The telescopic rod 13 can connect the two connecting blocks 14 together to form an integral structure. When the distance between the vertical poles 5 on both sides is adjusted, the telescopic rod 13 can be extended and retracted.

[0103] The two ends of the pull rope 15 are respectively tied to the two connecting blocks 14, and a rolling roller 16 is installed on the pull rope 15, and a counterweight 17 is rotatably installed at the rotating shaft of the roller 16. The counterweight 17 is a flat structure on the ground, and the counterweight 17 is used to provide downward gravity to the roller 16. The stretching is located in the space between the counterweight 17 and the roller 16. Under the action of gravity, the bottom position of the roller 16 is always in contact with the pull rope 15.

[0104] In this embodiment, a positioning ring is provided at the rear side of the counterweight 17, and the diameter of the positioning ring is the same as the outer diameter of the vertical pole 5. A counterweight block 18 is fixedly installed at the upper position of the front end of the counterweight 17, and the counterweight block 18 can keep the counterweight 17 in a horizontal position. The center of the positioning ring is exactly in the same plane as the axis of the vertical poles 5 on both sides. The center of the positioning ring and the rotation center of the roller 16 are also exactly in the same plane.

[0105] In this embodiment, after the vertical poles 5 on both sides are placed on the post-casting strip template, the roller 16 will provide downward force to the pull rope 15 under the action of the gravity of the counterweight 17, and because the two ends of the pull rope 15 are flush, the roller 16 will move to the middle position of the pull rope 15 and make the pull rope 15 tight. Therefore, the roller 16 is just in the middle position of the vertical poles 5 on both sides. Since the vertical poles on both sides are supported at the edge of the post-casting strip, the roller 16 and the position where it is located are on the middle axis of the post-casting strip, which can ensure that the three vertical poles 5 are in the same straight line.

[0106] At this time, it is only necessary to press the telescopic rod 13 downward, and the telescopic rod 13 moves downward with the connecting block 14, while the pull rope 15, the roller 16 and the counterweight 17 move downward synchronously. When pressing the telescopic rod 13 downward, it is necessary to operate smoothly and minimize the shaking of the counterweight 17 until the counterweight 17 contacts the ground, and then stop pressing the telescopic rod 13. The position where the counterweight 17 is located is the placement position of the middle vertical pole 5. When placing the middle vertical pole 5, the middle vertical pole 5 is placed in the positioning ring to support the post-casting strip template.

[0107] In this embodiment, the position of the middle pole 5 can be accurately determined.

[0108] Example 5

[0109] Further improvements made on the basis of Example 4: Fig.13As shown, the connecting block 14 is fixedly connected to the vertical poles 5 on both sides. It is necessary to ensure that the connecting block 14 has a sufficient height. When the roller 16 sags on the pull rope, it is ensured that the roller 16 and the counterweight 17 will not contact the ground. A positioning rod 19 is installed on the telescopic rod 13. A sliding hole is opened at the top of the positioning rod 19. The sliding hole is installed on the outside of the telescopic rod 13. In this embodiment, the diameter of the sliding hole is larger than the diameter of the telescopic rod 13. When the positioning rod 19 is installed together with the telescopic rod 13, due to the relatively large diameter of the sliding hole, the contact surface between the telescopic rod 13 is small, which can reduce the friction between the hole and the telescopic rod 13.

[0110] The positioning rod 19 is also designed as a retractable structure, which can refer to the design of a fishing rod. The roller 16 is rotatably mounted on the bottom of the positioning rod 19, and a counterweight portion 17 is fixedly mounted on the bottom of the positioning rod 19. A positioning ring is also provided on the counterweight portion 17. The counterweight block 18 is located at the upper front end of the counterweight portion 17. The counterweight block 18 can keep the counterweight portion 17 in a horizontal position, and the counterweight block 18 can also ensure that the positioning rod 19 is in a vertical state. In this embodiment, since the counterweight portion 17 will not contact the ground, the positioning rod 19 will always remain in a vertical state under the action of the gravity of the counterweight portion 17.

[0111] In this embodiment, after the vertical poles 5 on both sides are placed on the post-casting strip formwork, the roller 16 will provide a downward force to the pull rope 15 under the action of the gravity of the counterweight 17, and because the two ends of the pull rope 15 are flush, the roller 16 will move to the middle position of the pull rope 15, such as Fig. 9 As shown by the dotted arrow, under the action of gravity, the pull rope 15 is in a tensioned state.

[0112] During the movement of the roller 16, the positioning rod 19 will be extended, and at the same time, the roller 16 will provide an inward force for the positioning rod 19 to move horizontally along the telescopic rod 13. Fig. 9 As shown by the solid arrow, until the roller 16 is in the middle of the pull rope 15, the forces exerted by the pull rope 15 on both sides of the roller 16 are the same, the roller 16 stops moving, and the positioning rod 19 also stops moving.

[0113] The positioning rod 19 is also located in the middle of the pull rope 15, and the positioning rod 19 is always kept in a vertical position.

[0114] In this embodiment, the center of the positioning ring is exactly in the same plane as the axis of the two side poles 5, and the center of the positioning ring and the rotation center of the roller 16 are also exactly in the same plane, which can ensure that the three poles 5 are in the same straight line.

[0115] When the positions of the positioning rod 19, the roller 16 and the counterweight 17 are stable, the middle vertical rod 5 is installed on the ground from the positioning ring, and the middle vertical rod 5 is placed against the post-casting strip formwork. The position of the middle vertical rod 5 is the middle position of the post-casting strip formwork.

[0116] In this embodiment, since the positioning rod 19 is provided, the positioning rod 19 is in a vertical state under the gravity of the counterweight 17, and the positioning rod 19 can be used as a verticality standard for the intermediate pole 5. By measuring the vertical distance between the intermediate pole 5 and the two ends of the positioning rod 19, the verticality of the intermediate pole 5 can be detected to ensure the verticality of the intermediate pole 5. In this embodiment, while determining the position of the intermediate pole 5, it can also be used to detect the verticality of the intermediate pole 5 to ensure that the intermediate pole 5 is installed vertically, reducing the error caused by the inclination of the intermediate pole 5 on the measurement result of the wireless pressure sensor 6.

[0117] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A pre-enclosed structure for a post-casting zone, characterized in that: include: The water stop (1) is integrally cast with the concrete top plate at the edge of the post-cast strip; A prefabricated cover plate (2) is covered on the top of the post-cast strip, and the joint of the prefabricated cover plate (2) is set to a V-shaped structure and poured with fine stone concrete; The casting hole (3) is formed by integrally casting a steel pipe and a prefabricated cover plate (2); Temporary support (4) supporting the bottom of the concrete top slab at the edge of the post-cast strip; A plurality of vertical poles (5) are respectively supported at the two side edges of the post-cast strip template and at the middle position of the post-cast strip template, and a wireless pressure sensor (6) is arranged on the vertical pole (5) in the middle to collect pressure values ​​while supporting the template to bear force.

2. A settlement post-casting strip pre-enclosed structure according to claim 1, characterized in that: The intersection of the prefabricated cover plate (2) and the concrete top plate is set to be an arc angle; JS waterproof coating is applied between the prefabricated cover plate (2) and the counter-ridge of the water stop sill (1), and the gap is filled with foamed polyurethane.

3. A pre-enclosed structure for post-casting settling belt according to claim 2, characterized in that: The precast cover plate (2) at the location of the post-cast zone is divided by the beam. Each plate is sloped at a thousandth according to the pouring direction. The pouring holes (3) are spaced no more than 2m apart. The pouring holes are filled one by one in the direction from the outer wall to the inside of the basement.

4. A pre-enclosed structure for post-casting settling strip according to claim 3, characterized in that: The vertical poles (5) are arranged in three rows, respectively located on both sides and in the middle of the post-casting strip formwork; The vertical poles (5) located on both sides are used to support the two ends of the post-cast strip template, so that the post-cast strip forms a one-way plate for stress bearing; A wireless pressure sensor (6) is placed on the upper part of the middle vertical pole (5) to collect pressure values ​​while supporting the template.

5. A settlement post-casting strip pre-enclosed structure according to claim 4, characterized in that: A plurality of intermediate uprights (5) are evenly arranged in the same casting strip template.

6. The pre-enclosed structure of the post-casting zone according to claim 4 is characterized in that: A positioning device is also provided between the vertical poles (5) on both sides of the post-cast strip template and the middle vertical pole (5), for realizing position adjustment between the three vertical poles (5), so that the middle vertical pole (5) is located in the middle position of the vertical poles (5) on both sides.

7. A pre-enclosed structure for post-casting settling strip according to claim 6, characterized in that: The alignment device includes: A sliding seat (7) is slidably mounted on the middle vertical rod (5); Two gears (9) meshing with each other, a first rotating shaft (12) being fixedly mounted at the axis of the gear (9), and the first rotating shaft (12) being rotatably mounted on both sides of the sliding seat (7); Two swing rods (10), one end of which is fixedly connected to the first rotating shaft (12), and the other end of which is rotatably connected to the side vertical rod (5) via a hinge support (11); When the vertical poles (5) on both sides move in the same direction, under the meshing action of the gears (9), the two swinging rods (10) rotate at the same angle to ensure that the middle vertical pole (5) is located in the middle position of the vertical poles (5) on both sides.

8. The pre-enclosed structure of the post-casting zone according to claim 6 is characterized in that: The centering device includes: A telescopic rod (13) with two ends connected to the side upright poles (5), a pull rope (15) being tied to the two ends of the telescopic rod (13), the two ends of the pull rope (15) being on the same horizontal line, a rolling roller (16) being mounted on the pull rope (15), a counterweight (17) being rotatably mounted on the rotating shaft of the roller (16) for providing downward gravity to the roller (16); After the side poles (5) are fixed at the edge of the post-casting strip template, the rollers (16) will sag in the middle of the pull rope (15) under the action of gravity, and the sag position of the rollers (16) serves as a reference for installing the middle poles (5).

9. A method for pre-sealing a settlement post-casting strip, using a settlement post-casting strip pre-sealing structure according to any one of claims 1 to 8, characterized in that: The steps include: S1. Use a round steel pipe with a diameter of 150 and a wall thickness of 3mm as a temporary support for the post-casting strip; S2. Set 50mm high water stop sills on both sides of the post-cast strip and cast it together with the post-cast strip of the basement concrete top slab. The casting hole is cast together with the precast cover plate (2) using a steel pipe. At the same time, a water stop ring is set. Arc angles are set on both sides of the intersection between the precast cover plate and the basement, and waterproof membrane is laid. The prefabricated cover plate (2) is provided with a V-shaped butt joint at the joint. After the joint is completed, fine stone concrete is poured to fill the gap. JS waterproof coating is applied between the prefabricated cover plate and the counter-sill. At the same time, foamed polyurethane is used to fill the gap. S3. The concrete top slab of the basement at the location of the post-settlement belt is divided by the beam, and each precast cover plate (2) is sloped at 1 / 1000 according to the pouring direction, and the distance between the pouring holes is not more than 2m; S4. The bottom formwork of the post-cast strip is supported by three rows of vertical poles (5), and the vertical poles on both sides are used to support the two ends of the post-cast strip formwork, so that the post-cast strip forms a one-way plate stress form, and a wireless pressure sensor (6) is placed on the upper part of the middle vertical pole to collect pressure values ​​while serving as a template support stress; S5. At the same time, a steel funnel is placed on the pouring holes, and the pouring holes are filled one by one from the outer wall to the inside of the basement. Self-compacting concrete is used.

10. A method for pre-sealing a post-casting zone according to claim 9, characterized in that: The pressure value F of the wireless pressure sensor (6) is: ； Where q is the uniform load; L is the distance between the middle pole support point and one of the side pole support points; The actual pressure value measured by the wireless pressure sensor (6) is compared with the theoretical value to determine the compactness of the concrete pouring.

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