Construction method of underground comprehensive pipe gallery deformation joint water stop belt

Abstract

The application discloses a construction method of a deformation joint water stop belt of an underground comprehensive pipe gallery, which can fix a middle-buried water stop belt at a bottom plate deformation joint, prevent horizontal sliding of the middle-buried water stop belt, stably fix an externally-pasted water stop belt at a side wall construction joint, and make the externally-pasted water stop belt keep a preset interval with side wall steel bars, so that the anti-seepage effect at the deformation joint of the pipe gallery is improved. The construction method comprises the following steps: constructing a concrete cushion layer, a waterproof layer and a fine stone concrete protective layer, arranging the externally-pasted water stop belt at a deformation joint position on the top of the fine stone concrete protective layer, arranging bottom plate steel bars and side wall steel bars, arranging side molds at preset positions of the side wall steel bars, installing a first mold plate, installing the middle-buried water stop belt, and installing a second mold plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe gallery engineering, and particularly relates to a construction method of a deformation joint water stop belt of an underground comprehensive pipe gallery. BACKGROUND

[0002] The underground comprehensive pipe gallery refers to a structure and auxiliary facilities for accommodating urban engineering pipelines and is built underground in a city, and is important infrastructure for ensuring the operation of the city. The anti-seepage problem in the construction process of the underground comprehensive pipe gallery is crucial to the construction quality of the pipe gallery. At present, the seepage of the underground comprehensive pipe gallery usually occurs at the deformation joint of the bottom plate and the side wall. The main reasons for the seepage are as follows: the installation of the water stop belt at the deformation joint position is poor, which causes the poor combination of the water stop belt and the concrete, develops into a water seepage path, and leads to the seepage of the pipe gallery; and the uneven settlement or deformation of the pipe gallery causes the tearing of the water stop belt and causes the seepage of the deformation joint.

[0003] The water stop at the deformation joint of the pipe gallery is usually performed by using a middle-buried water stop belt and an externally attached water stop belt. The installation of the middle-buried water stop belt and the externally attached water stop belt has the following problems: during the pouring of the deformation joint of the pipe gallery, the installation of the middle-buried water stop belt at the deformation joint is usually performed by using two upper and lower formworks to clamp the water stop belt, and then using a tensioning screw and a wooden square to fix the formwork to the side formwork. In this way, the water stop belt is easily horizontally shifted during the pouring and vibrating of the concrete, which causes the deviation of the middle-buried water stop belt and affects the water stop effect. Moreover, the steel bars are dense at the deformation joint, and the bubbles generated during the vibrating of the concrete are not easy to be discharged, which easily causes the pores and non-densification at the combination of the middle-buried water stop belt and the concrete, and affects the construction quality of the pipe gallery. At the junction of the side wall and the bottom plate, the middle-buried water stop belt needs to be crimped and installed. The crimping and bending easily causes the breakage of the middle-buried water stop belt due to fatigue damage, which affects the water stop path, range and effect. During the installation of the externally attached water stop belt, the externally attached water stop belt is not tensioned or the joint is not firm, which easily causes the externally attached water stop belt to be warped and forms a water seepage path. During the installation of the formwork at the construction joint of the side wall, due to the installation deviation of the main steel bars, the externally attached water stop belt is tightly attached to the steel bars, which causes the externally attached water stop belt to not be effectively combined with the concrete and affects the water stop effect. During the fixing of the externally attached water stop belt, the externally attached water stop belt is fixed to the side formwork by using a screw. The fixing by using the screw damages the structure of the externally attached water stop belt and causes the seepage of the deformation joint. SUMMARY

[0004] One of the purposes of the present application is at least to provide a construction method of a deformation joint waterstop of an underground comprehensive pipe gallery, which can stably fix the embedded waterstop at the deformation joint of the bottom plate of the pipe gallery, prevent the horizontal sliding of the embedded waterstop, stably fix the externally attached waterstop at the construction joint of the side wall of the pipe gallery, and keep the externally attached waterstop at a preset distance from the side wall reinforcement, thereby improving the combination of the waterstop and the concrete and the anti-leakage effect of the deformation joint of the pipe gallery.

[0005] In order to achieve the above-mentioned purposes, the technical solutions adopted by the present application include the following aspects.

[0006] A construction method of a deformation joint waterstop of an underground comprehensive pipe gallery, comprising the following steps:

[0007] Step A: sequentially constructing a concrete cushion layer, a waterproof layer and a fine stone concrete protective layer from bottom to top at the construction area of the pipe gallery;

[0008] Step B: arranging an externally attached waterstop at the deformation joint position on the top of the fine stone concrete protective layer;

[0009] Step C: binding the bottom plate reinforcement and the side wall reinforcement of the pipe gallery on the top of the fine stone concrete protective layer and arranging a side form at a preset position of the side wall reinforcement;

[0010] Step D: arranging a first form plate at the deformation joint position of the bottom plate, and connecting the two ends of the first form plate with the side form respectively;

[0011] Step E: installing an embedded waterstop at the deformation joint position, placing the bottom of the deformation hole of the embedded waterstop into the deformation groove on the top of the first form plate, and clamping the first edge of the embedded waterstop into the channel between the first steel reinforcement support frame and the second steel reinforcement support frame;

[0012] Step F: installing a second form plate on the top of the embedded waterstop, clamping the deformation groove on the bottom of the second form plate with the top of the deformation hole of the embedded waterstop, and then connecting the first form plate with the second form plate and connecting the two ends of the second form plate with the side form respectively.

[0013] Preferably, the step C further comprises: before the side form is arranged, pasting the externally attached waterstop at the construction joint position of the side wall corresponding to the side form, and after the side form is arranged, arranging a clamping structure between the externally attached waterstop and the side wall reinforcement, and adjusting the clamping structure to abut against the externally attached waterstop.

[0014] Preferably, before installing the first template, the caulking plate is inserted into the first cavity of the first fixed block, the first connecting rod on the first fixed block is passed through the corresponding fixed hole on the first template, the first connecting rod is fixed on the first template by using the nut, the surface of the first fixed block is attached to the inner side of the first template, and the first fixed block is installed on the top of the first template.

[0015] Preferably, after the first template is installed, the insertion type air exhaust pipe is inserted at the preset position of the first template, the air exhaust pipe is arranged in an inclined manner, the air exhaust pipe is arranged at the first side bottom of the embedded water stop belt, and the end portion of the air exhaust pipe does not extend out of the first side end portion of the embedded water stop belt.

[0016] Preferably, the first template is provided with a first fixing structure, and the second template is provided with a second fixing structure; the first fixing structure comprises a first horizontal plate, a first vertical plate and a first supporting plate, the bottom of the first template or the bottom of the first horizontal plate is provided with a first protruding plate, and the top of the first supporting plate is vertically provided with a supporting rod; the second fixing structure comprises a second horizontal plate, the first end of the second horizontal plate is connected with the second template, and the second end of the second horizontal plate is sleeved with the supporting rod; the supporting rod is further provided with an adjusting nut, and the adjusting nut is arranged at the top of the second horizontal plate.

[0017] Preferably, the connecting process of the first template and the second template comprises the following steps: the top of the supporting rod is passed through the second horizontal plate, the bottom of the supporting rod is detachably connected to the first supporting plate through a bolt, the adjusting nut is inserted into the supporting rod from the top of the supporting rod, and the adjusting nut is adjusted to press the embedded water stop belt tightly.

[0018] Preferably, before the top of the supporting rod is passed through the second horizontal plate, the second clamping plate is inserted into the first clamping plate on the top of the first template, the first clamping plate is rotationally connected with the first template, the fourth clamping plate is inserted into the third clamping plate on the top of the second template, the third clamping plate is rotationally connected with the second template, the first sleeve is inserted into the supporting rod, the top of the supporting rod passes through the first connecting plate and the second connecting plate in sequence from bottom to top, and then the second sleeve is inserted into the supporting rod.

[0019] Preferably, before installing the second template, the caulking plate is inserted into the second cavity of the second fixed block, the second connecting rod on the second fixed block is passed through the corresponding fixed hole on the second template, the second connecting rod is fixed on the second template by using the nut, the surface of the second fixed block is attached to the inner side of the second template, and the second fixed block is installed on the bottom of the second template.

[0020] Preferably, the clamping structure comprises a clamping plate, a through hole is coaxially arranged in the middle part of the clamping plate, first bosses are arranged at the left and right ends of the clamping plate respectively for clamping in the notches at the two ends of the externally attached waterstop, the first bosses are integrally arranged at the bottom of the clamping plate, second bosses are arranged at the middle part of the clamping plate for abutting at the deformation holes of the middle part of the externally attached waterstop, the second bosses are integrally arranged at the bottom of the clamping plate, and the two second bosses are arranged at the front and rear ends of the clamping plate respectively; a plurality of connecting holes are arranged on the clamping plate, the connecting holes extend axially into the first bosses from the top of the clamping plate, and the connecting holes also extend axially into the second bosses from the top of the clamping plate; the clamping plate is connected with the first end of the connecting rib, and the second end of the connecting rib is connected with the main rib.

[0021] Preferably, the adjusting process of the clamping structure comprises: making the first bosses of the clamping plate face the notches of the externally attached waterstop, making the second bosses face the deformation holes of the externally attached waterstop, inserting the connecting rib into the connecting holes of the clamping plate, adjusting the length of the connecting rib, abutting the first end of the connecting rib against the clamping plate, and connecting the second end of the connecting rib with the main rib of the pipe gallery side wall.

[0022] In summary, due to the adoption of the above technical solutions, the present application has at least the following beneficial effects:

[0023] By arranging the first and second molds, arranging the concave deformation grooves on the mutually approaching surfaces of the first and second molds respectively, arranging the deformation grooves along the length directions of the first and second molds respectively, and matching the deformation grooves with the deformation holes of the embedded waterstop, the deformation grooves can stably clamp the deformation holes of the embedded waterstop and prevent the embedded waterstop from horizontally sliding; by arranging the first and second fixing structures on the first and second molds respectively, and connecting the first and second fixing structures, the second mold can exert downward pressure, improve the fixing effect on the embedded waterstop, clamp the second edge of the embedded waterstop, keep the second edge of the embedded waterstop in a straight state, and prevent the second edge of the embedded waterstop from being damaged.

[0024] By arranging the first and second steel bar support frames, the first and second steel bar support frames can clamp the first edge of the embedded waterstop, and improve the stability of the embedded waterstop installation.

[0025] By arranging the clamping structure, after the externally attached waterstop is pasted on the side mold, the clamping structure can abut against the externally attached waterstop, prevent the externally attached waterstop from curling, and keep the externally attached waterstop at a preset distance from the side wall steel bar, thereby improving the combination effect of the externally attached waterstop and the concrete and the anti-leakage effect of the deformation joint of the pipe gallery side wall. By arranging the air extraction pipe on the first mold, the air bubbles accumulated at the bottom of the embedded waterstop can be extracted, and the combination effect of the embedded waterstop and the concrete is improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic diagram of a fixing device of a deformation joint waterstop at a bottom plate of an underground comprehensive pipe gallery according to an exemplary embodiment of the present application.

[0027] Figure 2 is a side view of a clamping structure connected with an externally attached waterstop according to an exemplary embodiment of the present application.

[0028] Figure 3 is a top view of a clamping plate structure connected with an externally attached waterstop according to an exemplary embodiment of the present application.

[0029] Figure 4 is a schematic diagram of a clamping structure connected with a main reinforcement at a side wall of an underground comprehensive pipe gallery according to an exemplary embodiment of the present application.

[0030] Identified in the figure: 1 - first formwork, 100 - first ribbed plate, 2 - second formwork, 200 - second ribbed plate, 3 - internally embedded waterstop, 4 - deformation groove, 5 - first fixing structure, 500 - first horizontal plate, 501 - first vertical plate, 502 - first protruding plate, 503 - first support plate, 504 - support rod, 505 - first clamping plate, 506 - second clamping plate, 507 - first connecting plate, 508 - first sleeve, 6 - second fixing structure, 600 - second horizontal plate, 601 - adjusting nut, 603 - third clamping plate, 604 - fourth clamping plate, 605 - second connecting plate, 606 - second sleeve, 7 - first steel reinforcement support frame, 8 - second steel reinforcement support frame, 9 - clamping structure, 10 - first fixing block, 10a - first connecting rod, 11 - second fixing block, 11a - second connecting rod, 12 - caulking plate, 13 - air extraction pipe, 14 - clamping structure, 141 - clamping plate, 142 - first protruding boss, 143 - second protruding boss, 144 - through hole, 145 - connecting reinforcement, 146 - third sleeve, 147 - clamping hoop, 15 - externally attached waterstop, 16 - main reinforcement. DETAILED DESCRIPTION

[0031] The present application will be further described below in conjunction with the drawings and embodiments, so that the purpose, technical scheme and advantages of the present application are more clearly and obviously understood. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0032] REFERENCE Figures 1-4The fixing device of the underground comprehensive pipe gallery deformation joint water stop belt of the exemplary embodiment of the present application comprises: oppositely arranged first and second formworks 1 and 2, deformation grooves 4 for clamping deformation holes of the middle-buried water stop belt 3 are respectively arranged on mutually approaching surfaces of the first and second formworks 1 and 2, the shape of the deformation grooves 4 is matched with the shape of the deformation holes of the middle-buried water stop belt 3, both ends of the first formwork 1 are respectively connected with side forms, both ends of the second formwork 2 are respectively connected with side forms, the first formwork 1 is provided with a first fixing structure 5, and the second formwork 2 is provided with a second fixing structure 6, and the second fixing structure 6 is connected with the first fixing structure 5.

[0033] After the first and second formworks 1 and 2 clamp the middle-buried water stop belt 3, the deformation grooves 4 of the first and second formworks 1 and 2 are respectively located on both sides of the deformation holes of the middle-buried water stop belt 3, and during pouring of concrete, the deformation grooves 4 can effectively prevent the middle-buried water stop belt 3 from horizontally sliding, and moreover, the deformation holes are contained in the deformation grooves 4, which can prevent the deformation holes from being crushed by the formwork, so that the middle-buried water stop belt 3 maintains the deformation ability at the deformation joint, thereby preventing the middle-buried water stop belt 3 from being damaged in the deformation process of the structure bodies at both ends of the deformation joint, and improving the anti-leakage effect of the deformation joint. After the first formwork 1 is installed at the position of the deformation joint, the first fixing structure 5 can not only support the first formwork 1, but also protect the externally-taped water stop belt from being damaged, and after the first and second fixing structures 5 and 6 are connected, the second formwork 2 can exert downward pressure on the middle-buried water stop belt 3, further improving the stability of the installation of the middle-buried water stop belt 3.

[0034] The left and right ends of the first formwork 1 are respectively provided with first rib plates 100, each first rib plate 100 is arranged along the height direction of the first formwork 1, the first rib plates 100 are fixedly connected to the first formwork 1, a plurality of first mounting holes are arranged in the height direction of each first rib plate 100, so that the first rib plates 100 are detachably connected to the side forms through bolts or tension rods, and the left and right ends of the second formwork 2 are respectively provided with second rib plates 200, each second rib plate 200 is arranged along the height direction of the second formwork 2, the second rib plates 200 are fixedly connected to the second formwork 2, and a plurality of second mounting holes are arranged in the height direction of each second rib plate 200, so that the second rib plates 200 are detachably connected to the side forms through bolts or tension rods.

[0035] The first fixed structure 5 is arranged outside the first formwork 1 along the length direction of the first formwork 1, and the first fixed structure 5 comprises a first horizontal plate 500 arranged at the bottom of the first formwork 1, the first end of the first horizontal plate 500 is connected with the first formwork 1, and the second end of the first horizontal plate 500 is vertically provided with a first vertical plate 501 arranged at the bottom of the first horizontal plate 500 and forming an L-shaped structure with the first horizontal plate 500, the first horizontal plate 500 and the first vertical plate 501 are welded or integrally formed, the height of the first vertical plate 501 is not less than the height of the externally-taped waterstop, the first horizontal plate 500 and the first vertical plate 501 fix the externally-taped waterstop on the top of the concrete protection layer, which can prevent the externally-taped waterstop from being damaged, and the bottom of the first formwork 1 or the bottom of the first horizontal plate 500 is further provided with a first convex plate 502 extending into the notch of the externally-taped waterstop; the bottom of the first vertical plate 501 is further vertically provided with a first support plate 503 forming an L-shaped structure with the first vertical plate 501, the top of the first support plate 503 is vertically provided with a support rod 504, and the bottom of the support rod 504 is detachably connected with the first support plate 503 through bolts.

[0036] The second fixed structure 6 is arranged outside the second formwork 2 along the length direction of the second formwork 2, and the second fixed structure 6 comprises a second horizontal plate 600 arranged at the top of the second formwork 2, the first end of the second horizontal plate 600 is connected with the second formwork 2, and the second end of the second horizontal plate 600 is sleeved with the support rod 504, the shank of the support rod 504 is provided with external threads, and the support rod 504 is further provided with an adjusting nut 601 arranged at the top of the second horizontal plate 600, by adjusting the position of the adjusting nut 601 on the support rod 504, the downward pressure can be applied to the second horizontal plate 600, so that the second formwork 2 presses the embedded waterstop 3.

[0037] The first fixed structure 5 further comprises a first clamping plate 505 and a second clamping plate 506 movably arranged, the first end of the first clamping plate 505 is rotatably connected to the first mold plate 1 and arranged near the top of the first mold plate 1, the length of the second clamping plate 506 is not greater than that of the first clamping plate 505, the first end of the second clamping plate 506 is inserted into the first clamping plate 505 through the second end of the first clamping plate 505, the second end of the second clamping plate 506 is rotatably connected to the first connecting plate 507, the first connecting plate 507 is sleeved on the supporting rod 504, the first sleeve 508 is further arranged on the supporting rod 504, the first sleeve 508 is arranged at the bottom of the first connecting plate 507, by adjusting the position of the first sleeve 508 on the supporting rod 504, the position of the first connecting plate 507 on the supporting rod 504 can be adjusted, so as to adjust the rotation angle of the first clamping plate 505 and the second clamping plate 506. When the first connecting plate 507 moves on the supporting rod 504, the second clamping plate 506 can slide relative to the first clamping plate 505, under the action of the first connecting plate 507 and the second clamping plate 506, the second clamping plate 506 can be rotated at an angle.

[0038] The second fixed structure 6 further comprises a third clamping plate 603 and a fourth clamping plate 604 movably arranged, the first end of the third clamping plate 603 is rotatably connected to the second mold plate 2 and arranged near the top of the second mold plate 2, the length of the fourth clamping plate 604 is not greater than that of the third clamping plate 603, the first end of the fourth clamping plate 604 is inserted into the third clamping plate 603 through the second end of the third clamping plate 603, the second end of the fourth clamping plate 604 is rotatably connected to the second connecting plate 605, the second connecting plate 605 is sleeved on the supporting rod 504, the second sleeve 606 is further arranged on the supporting rod 504, the second sleeve 606 is arranged at the top of the second connecting plate 605, by adjusting the position of the second sleeve 606 on the supporting rod 504, the position of the second connecting plate 605 on the supporting rod 504 can be adjusted, so as to adjust the rotation angle of the third clamping plate 603 and the fourth clamping plate 604. When the second connecting plate 605 moves on the supporting rod 504, the fourth clamping plate 604 can slide relative to the third clamping plate 603, under the action of the second connecting plate 605 and the fourth clamping plate 604, the third clamping plate 603 can be rotated at an angle.

[0039] The second edge of the embedded waterstop 3 is located between the first clamping plate 505 and the third clamping plate 603, so that the second edge of the embedded waterstop 3 is kept straight; by adjusting the angle of the first clamping plate 505 and the third clamping plate 603, the first clamping plate 505 and the third clamping plate 603 can stably clamp the embedded waterstop 3 with different inclination angles, and the first clamping plate 505 and the third clamping plate 603 can also protect the second edge of the embedded waterstop 3 to prevent damage to the embedded waterstop 3; the clamping plate and the supporting rod can also support the first and second forms to ensure the stability of the installation of the first and second forms.

[0040] The fixing device further comprises a first steel bar support frame 7 and a second steel bar support frame 8 for supporting the first edge of the embedded waterstop 3, the first steel bar support frame 7 and the second steel bar support frame 8 are respectively arranged on both sides of the first edge of the embedded waterstop 3, and the first steel bar support frame 7 and the second steel bar support frame 8 are fixedly connected with the bottom plate steel bars of the pipe gallery. The first steel bar support frame 7 and the second steel bar support frame 8 not only can support the embedded waterstop 3 to keep the first edge of the embedded waterstop 3 straight, but also can improve the anti-sliding effect of the embedded waterstop 3. In the preferred embodiment, the angle between the two edges of the embedded waterstop 3 and the horizontal plane is 0-30 degrees, and the angle between the two edges of the embedded waterstop 3 and the horizontal plane can improve the anti-sliding ability of the embedded waterstop 3 and the anti-leakage performance of the deformation joint; at the deformation joint of the pipe gallery bottom plate, the angle between the two edges of the embedded waterstop 3 and the horizontal plane is preferably 30 degrees. When the two edges of the embedded waterstop 3 have an angle with the horizontal plane, the cross-sectional shape of the first steel bar support frame 7 is a trapezoidal structure, the cross-sectional shape of the second steel bar support frame 8 is a triangular or trapezoidal structure, and one of the oblique edges of the first steel bar support frame 7 and one of the oblique edges of the second steel bar support frame 8 are respectively located on both sides of the first edge of the embedded waterstop 3, so that the first edge of the embedded waterstop 3 is clamped into the channel formed by the two oblique edges. During the concrete pouring and vibrating process, the oblique edges of the first steel bar support frame 7 and the second steel bar support frame 8 can block the first edge of the embedded waterstop 3, effectively preventing the horizontal sliding of the embedded waterstop 3. When the two edges of the embedded waterstop 3 have no angle with the horizontal plane, the cross section of the first steel bar support frame 7 and the cross section of the second steel bar support frame 8 are both rectangular.

[0041] The inner surface (the surface in contact with the concrete) of the first template 1 is further detachably provided with a first fixing block 10, which is arranged at the top of the first template 1. The overall shape of the first fixing block 10 is rectangular structure. The top of the first fixing block 10 is provided with an inner recessed deformation groove 4. The bottom of the first fixing block 10 is provided with a first opening, which extends from the bottom to the top of the first fixing block 10, so that the inside of the first fixing block 10 forms a first cavity. The inner surface of the second template 2 is further detachably provided with a second fixing block 11, which is arranged at the bottom of the second template 2. The overall shape of the second fixing block 11 is rectangular structure. The bottom of the second fixing block 11 is provided with an inner recessed deformation groove 4. The top of the second fixing block 11 is provided with a second opening, which extends from the top to the bottom of the second fixing block 11, so that the inside of the second fixing block 11 forms a second cavity. The first cavity and the second cavity are respectively filled with a caulking board 12. The caulking board 12 is made of elastic material to prevent the expansion joint from being damaged in the deformation process. The caulking board 12 is also used to prevent water from entering the expansion joint, thereby improving the anti-seepage effect of the expansion joint. The caulking board 12 is preferably made of polyethylene foam caulking board.

[0042] The height of the first fixing block 10 is less than the height of the first formwork 1, the height of the second fixing block 11 is less than the height of the second formwork 2, after the caulking plate 12 is inserted into the first cavity, the bottom of the caulking plate 12 extends to the bottom of the first formwork 1, after the caulking plate 12 is inserted into the second cavity, the top of the caulking plate 12 extends out of the cavity (the length of the caulking plate 12 extending out is determined according to construction requirements). After the first formwork 1 and the second formwork 2 are removed, the caulking plate 12 is fixed at the deformation joint with the first fixing block 10 and the second fixing block 11 respectively, the caulking plate 12 is installed in place at the same time of the formwork installation, which is beneficial to improve the construction efficiency of the deformation joint of the pipe gallery. The left and right ends of the first fixing block 10 are respectively provided with first connecting rods 10a, the first connecting rods 10a are used for detachably connecting the first fixing block 10 to the first formwork 1 through bolts, the left and right ends of the second fixing block 11 are respectively provided with second connecting rods 11a, the second connecting rods 11a are used for detachably connecting the second fixing block 11 to the second formwork 2 through bolts, the first connecting rods 10a are also used for pre-burying the first fixing block 10 into the concrete, the second connecting rods 11a are also used for pre-burying the second fixing block 11 into the concrete, the first fixing block 10 and the second fixing block 11 can keep the caulking plate 12 in a straight state, and make the concrete and the caulking plate 12 tightly combined, so as to facilitate the smooth progress of the subsequent construction of the pipe gallery. The first connecting rods 10a can also be fixedly connected (bolted or welded) with the first steel reinforcement support frame 7, and the second connecting rods 11a can also be fixedly connected (bolted or welded) with the second steel reinforcement support frame 8. The first fixing block 10 and the second fixing block 11 are both made of elastic materials, for example, stainless steel, spring steel, aluminum alloy, nickel-titanium alloy, rubber-metal composite material, etc., which have good elastic expansion performance, under the temperature action on both sides of the expansion joint, the first fixing block 10 and the second fixing block 11 can deform together with the caulking plate 12, thereby improving the anti-leakage effect of the expansion joint.

[0043] The first formwork 1 is also provided with an air extraction hole penetrating through the first formwork 1, an air extraction pipe 13 is inserted into the air extraction hole, the air extraction pipe 13 is a stainless steel air extraction pipe, and the air extraction pipe 13 extends into the bottom of the first side of the embedded waterstop 3; under the action of the embedded waterstop 3 and the steel reinforcements around the embedded waterstop 3, the gas bubbles generated in the concrete vibration process are accumulated at the bottom of the first side of the embedded waterstop 3, after the gas bubbles are extracted through the air extraction pipe 13, holes can be effectively avoided at the joint of the embedded waterstop 3 and the concrete, which affects the construction quality of the bottom plate of the pipe gallery. When the two sides of the embedded waterstop 3 have an included angle, the air extraction pipe 13 is arranged obliquely, and the oblique angle is 10-30 degrees.

[0044] The middle-buried waterstop 3 is a steel edge rubber waterstop, the intersection position of the floor and the side wall of the pipe gallery, the mutually close surfaces of the first formwork 1 and the second formwork 2 are arc structures, under the action of the arc structures of the first formwork 1 and the second formwork 2, the steel edge of the middle-buried waterstop 3 can be prevented from being damaged by bending, and the waterstop effect of the middle-buried waterstop 3 is ensured.

[0045] The fixing device further comprises a clamping structure 14 for fixing the externally-applied waterstop 15, referring to Figure 2 、 Figure 3 , the clamping structure 14 comprises a clamping plate 141, a through hole 144 is coaxially arranged in the middle part of the clamping plate 141, first bosses 142 are respectively arranged at the left and right ends of the clamping plate 141, the first bosses 142 are integrally arranged at the bottom of the clamping plate 141, the first bosses 142 are arranged along the width direction of the clamping plate 141, second bosses 143 are arranged at the middle part of the clamping plate 141, the second bosses 143 are integrally arranged at the bottom of the clamping plate 141, and two second bosses 143 are respectively arranged at the front and rear ends of the clamping plate 141; the first bosses 142 are used for being clamped in the notches at the two ends of the externally-applied waterstop 15, and the second bosses 143 are used for abutting at the deformation holes in the middle part of the externally-applied waterstop 15; the length of the first boss 142 is longer than the length of the second boss 143, so that the end surface of the first boss 142 and the end surface of the second boss 143 can be in good contact with the surface of the externally-applied waterstop 15. A plurality of connecting holes are arranged on the clamping plate 141, the connecting holes extend axially into the first bosses 142 from the top of the clamping plate 141, the connecting holes also extend axially into the second bosses 143 from the top of the clamping plate 141, the connecting holes are cylindrical blind holes, the bottoms of the connecting holes are in a closed state, connecting ribs 145 are arranged in the connecting holes, the first ends of the connecting ribs 145 extend into the connecting holes, and the second ends of the connecting ribs 145 are connected to the main rib 16 of the pipe gallery. The connecting holes can also be threaded blind holes, which can increase the stability of the connection between the clamping plate 141 and the connecting rib 145, so as to improve the stability of the clamping plate 141 in the adjusting process of the connecting rib 145. Under the action of the clamping plate 141 and the connecting rib 145, the externally-applied waterstop 15 can be tightly attached to the side form, effectively avoiding the curling of the externally-applied waterstop 15 during the concrete pouring process, and improving the waterstop effect of the deformation joint of the side wall of the pipe gallery; the clamping plate 141 and the connecting rib 145 can also separate the externally-applied waterstop 15 from the main rib 16 of the pipe gallery and maintain a separation distance, so that the externally-applied waterstop 15 is effectively combined with the concrete, thereby improving the waterstop effect of the deformation joint of the side wall of the pipe gallery; during the pouring of the concrete, the concrete can enter the notches of the externally-applied waterstop 15 from the through hole 144 in the middle part of the clamping plate 141, so that the externally-applied waterstop 15, the clamping plate 141 and the concrete are tightly combined.

[0046] The second end of the connecting rib 145 can be connected to the main rib 16 of the pipe gallery by welding, or can be detachably connected to the main rib 16 of the pipe gallery, and when detachably connected, a thread is arranged in the length direction of the connecting rib 145, the second end of the connecting rib 145 is threadedly connected to a third sleeve 146, the second end of the connecting rib 145 extends out of the third sleeve 146, a clamp 147 is arranged on the third sleeve 146, and the clamp 147 is connected to the main rib 16 of the pipe gallery (the third sleeve can also be directly welded to the main rib of the pipe gallery); after the clamp or the third sleeve is connected to the main rib 16 of the pipe gallery, the length of the connecting rib 145 can be adjusted by rotating the connecting rib 145, so that the first end of the connecting rib 145 abuts against the clamping plate 141, and thus the first boss 142 and the second boss 143 on the clamping plate 141 abut against the outer-applied waterstop 15.

[0047] In the application process, the clamping structure 14 is not only suitable for the deformation joint of the side wall of the pipe gallery, but also can be used to separate the outer-applied waterstop 15 from the steel reinforcement of the pipe gallery when the outer-applied waterstop 15 of the deformation joint of other parts of the pipe gallery is attached to the steel reinforcement of the pipe gallery, and the clamping structure 14 abuts against the outer-applied waterstop 15, so that the outer-applied waterstop 15 is attached to the formwork, and the outer-applied waterstop 15 is prevented from being curled during the concrete pouring process.

[0048] The application also provides a construction method of a deformation joint waterstop for an underground comprehensive pipe gallery, and the construction method comprises the following steps:

[0049] Step A: a 20-30cm-thick C20 concrete cushion layer, a 1-3mm-thick waterproof layer, and a 5-10cm-thick fine stone concrete protective layer are sequentially constructed from bottom to top in the construction area of the pipe gallery, the waterproof layer is constructed by using a pressure-sensitive reaction type self-adhesive high polymer waterproof roll material; before the fine stone concrete protective layer is constructed at the deformation joint position, a roll material reinforcing layer is arranged on the top of the waterproof layer, the roll material reinforcing layer can be the same pressure-sensitive reaction type self-adhesive high polymer waterproof roll material as the waterproof layer, or can be other waterproof roll materials, the width of the roll material reinforcing layer is wider than the width of the outer-applied waterstop 15, and the width of the roll material reinforcing layer is preferably 50-80cm.

[0050] Step B: the outer-applied waterstop 15 is arranged at the deformation joint position on the top of the fine stone concrete protective layer, when the outer-applied waterstop 15 is arranged, a strong double-sided adhesive magic tape is pasted on the back surface (the surface opposite to the notch of the outer-applied waterstop 15) of the outer-applied waterstop 15, and then the outer-applied waterstop 15 is pasted at the deformation joint position.

[0051] Step C, tie the bottom plate steel bars and side wall steel bars of the pipe gallery on the top of the fine stone concrete protective layer, and set side forms at the preset positions of the side wall steel bars; during the process of tying the bottom plate steel bars, set a first steel bar support frame 7 and a second steel bar support frame 8 at the position of the deformation joint, the second steel bar support frame 8 is arranged above the first steel bar support frame 7, both the first steel bar support frame 7 and the second steel bar support frame 8 are connected with the bottom plate steel bars, the first steel bar support frame 7 and the second steel bar support frame 8 are connected through steel bars, and a channel for clamping and fixing the first side of the embedded waterstop 3 is formed between the first steel bar support frame 7 and the second steel bar support frame 8. When the included angle between the two sides of the embedded waterstop 3 and the horizontal plane is 10-30 degrees, the cross-sectional shape of the first steel bar support frame 7 is a right trapezoid, the cross-sectional shape of the second steel bar support frame 8 is a right triangle, and the inclination angle of the channel between the first steel bar support frame 7 and the second steel bar support frame 8 is 10-30 degrees.

[0052] Step D, set the first formwork 1 at the position of the bottom plate deformation joint, so that the first fixed structure 5 clamps the externally attached waterstop, and connect the two ends of the first formwork 1 with the side forms respectively (through bolts and / or tensioning screw rods); before setting the first formwork 1, the caulking plate 12 can also be inserted into the first cavity of the first fixed block 10 (the height of the caulking plate is determined according to the installation height of the embedded waterstop), and the first fixed block 10 is installed on the top of the inner side surface of the first formwork 1; when installing the first fixed block 10, the first connecting rod 10a on the first fixed block 10 is inserted through the corresponding fixed hole on the first formwork 1, and the first connecting rod 10a is fixed on the first formwork 1 by using a nut, so that the surface of the first fixed block 10 is attached to the inner side surface of the first formwork 1, and the first fixed block 10 is installed on the top of the first formwork; when the first fixed block 10 is arranged on the first formwork 1, the bottom of the caulking plate 12 is opposite to the top of the deformation hole of the externally attached waterstop 15 during the installation of the first formwork 1. After the installation of the first formwork 1 is completed, the air extraction pipe 13 is inserted and installed at the preset position of the first formwork 1, the air extraction pipe 13 is arranged obliquely, the air extraction pipe 13 is arranged at the bottom of the first side of the embedded waterstop 3, and the end portion of the air extraction pipe 13 does not protrude from the end portion of the first side of the embedded waterstop 3; when the caulking plate 12 is attached to the first formwork 1, the air extraction pipe 13 simultaneously penetrates through the caulking plate 12 and the first formwork 1; after the pouring height of the bottom plate concrete exceeds the installation height of the embedded waterstop 3, the air extraction pipe 13 is removed from the first formwork 1, and the first formwork 1 is sealed.

[0053] Step E, install the embedded waterstop 3 at the deformation joint position, and put the bottom of the deformation hole of the embedded waterstop 3 into the deformation groove 4 on the top of the first formwork 1; when the first steel bar support frame 7 and the second steel bar support frame 8 are provided, during the installation of the embedded waterstop 3, first put the first edge of the embedded waterstop 3 into the channel between the first steel bar support frame 7 and the second steel bar support frame 8, and then put the bottom of the deformation hole of the embedded waterstop 3 into the deformation groove 4 on the top of the first formwork 1; after the deformation hole is put into the deformation groove 4, the first edge of the embedded waterstop 3 can also be welded with the first steel bar support frame 7 or the second steel bar support frame 8 to keep the first edge of the embedded waterstop 3 straight and further prevent the embedded waterstop 3 from sliding horizontally. When the first fixed block 10 is provided on the first formwork 1, during the installation of the embedded waterstop 3, put the bottom of the deformation hole of the embedded waterstop 3 into the deformation groove 4 on the top of the first fixed block 10.

[0054] Step F, install the second formwork 2 on the top of the embedded waterstop 3, so that the deformation groove 4 on the bottom of the second formwork 2 engages the top of the deformation hole of the embedded waterstop 3; insert the second clamping plate 506 into the first clamping plate 505 on the top of the first formwork 1, the first clamping plate 505 is rotationally connected with the first formwork 1, insert the fourth clamping plate 604 into the third clamping plate 603 on the top of the second formwork 2, the third clamping plate 603 is rotationally connected with the second formwork 2, after the first sleeve 508 is inserted into the support rod 504, the top of the support rod 504 passes through the first connecting plate 507 and the second connecting plate 605 in turn from bottom to top, then the second sleeve 606 is inserted into the support rod 504, after the second sleeve 606 is inserted, the top of the support rod 504 passes through the second cross plate 600 upwards, then the bottom of the support rod 504 is connected to the first support plate 503 by bolts; after the support rod 504 is connected to the first support plate 503, the adjusting nut 601 is inserted from the top of the support rod 504, the adjusting nut 601 is adjusted to press the embedded waterstop 3 tightly, and then the two ends of the second formwork 2 are connected with the side forms respectively. After the second formwork 2 is connected with the side forms, the first sleeve 508 and the second sleeve 606 on the support rod 504 are adjusted respectively, so that the second edge of the embedded waterstop 3 is between the first clamping plate 505 and the third clamping plate 603. In the application process, the second edge of the embedded waterstop 3 can also be directly hinged with the first connecting plate 507, so that the second edge of the embedded waterstop 3 remains straight.

[0055] Before the second formwork 2 is installed, the caulking plate 12 can be inserted into the second cavity of the second fixed block 11, and the second fixed block 11 is installed at the bottom of the inner side surface of the second formwork 2; when the second fixed block 11 is installed, the second connecting rod 11a on the second fixed block 11 is inserted through the corresponding fixed hole on the second formwork 2, and the second connecting rod 11a is fixed on the second formwork 2 by using a nut, so that the surface of the second fixed block 11 is attached to the inner side surface of the second formwork 2, and the second fixed block 11 is installed at the bottom of the second formwork 2.

[0056] The construction method further comprises the step of arranging the externally attached waterstop 15 on the side formwork. Before the side formwork is arranged, the externally attached waterstop 15 is attached to the side formwork at the construction joint position corresponding to the side wall. After the side formwork is arranged, the clamping structure 14 is arranged between the externally attached waterstop 15 and the side wall reinforcement. The clamping structure 14 is adjusted so that the clamping structure 14 abuts against the externally attached waterstop 15 and the externally attached waterstop 15 is kept at a preset distance from the main reinforcement 16. The adjustment process of the clamping structure 14 comprises: the first boss 142 of the clamping plate 141 is aligned with the notch of the externally attached waterstop 15, the second boss 143 is aligned with the deformation hole of the externally attached waterstop 15, the connecting rod 145 is inserted into the connecting hole of the clamping plate 141, the length of the connecting rod 145 is adjusted, the first end of the connecting rod 145 abuts against the clamping plate 141, and the second end of the connecting rod 145 is welded to the main reinforcement 16 of the side wall. The second end of the connecting rod 145 can also be detachably connected to the main reinforcement 16. When the detachable connection is made, the third sleeve 146 is arranged on the clamping hoop 147, and then the clamping hoop 147 is connected to the main reinforcement 16 of the side wall at a preset position. The arrangement position of the clamping hoop 147 on the main reinforcement 16 of the side wall is determined according to the arrangement position of the externally attached waterstop 15 (the third sleeve can also be directly welded to the main reinforcement). After the first boss 142 of the clamping plate 141 is aligned with the notch of the externally attached waterstop 15 and the second boss 143 is aligned with the deformation hole of the externally attached waterstop 15, the second end of the connecting rod 145 is screwed into the third sleeve 146. The length of the connecting rod 145 is adjusted by rotating the connecting rod 145. After the first end of the connecting rod 145 is inserted into the connecting hole, the length of the connecting rod 145 is further adjusted so that the first boss 142 and the second boss 143 of the clamping plate 141 abut against the externally attached waterstop 15.

[0057] The above description is only a detailed description of the specific implementation of the present application, and is not a limitation of the present application. Various substitutions, modifications and improvements made by those skilled in the related technical field without departing from the principles and scope of the present application shall be included in the protection scope of the present application.

Claims

1. A construction method for a waterstop strip at the expansion joint of an underground integrated pipe gallery, characterized in that, Includes the following steps: Step A: Construct the concrete foundation, waterproof layer, and fine aggregate concrete protective layer in the construction area of ​​the utility tunnel from bottom to top. Step B: Install an external waterstop (15) at the expansion joint position on top of the fine stone concrete protective layer. Step C: Tie the bottom slab reinforcement and side wall reinforcement of the pipe gallery on top of the fine stone concrete protective layer, and set the side formwork at the preset position of the side wall reinforcement. Step D: Set the first template (1) at the deformation joint of the base plate and connect the two ends of the first template (1) to the side mold respectively; before installing the first template (1), insert the joint filler (12) into the first cavity of the first fixing block (10), pass the first connecting rod (10a) on the first fixing block (10) through the corresponding fixing hole on the first template (1), and fix the first connecting rod (10a) on the first template (1) with a nut so that the surface of the first fixing block (10) fits the inner side of the first template (1), and the first fixing block (10) is installed on the top of the first template (1); Step E: Install the embedded waterstop (3) at the expansion joint location, put the bottom of the deformation hole of the embedded waterstop (3) into the deformation groove (4) at the top of the first template (1), and insert the first side of the embedded waterstop (3) into the channel between the first steel reinforcement support frame (7) and the second steel reinforcement support frame (8). Step F: Install the second template (2) on the top of the embedded waterstop (3), so that the deformation groove (4) at the bottom of the second template (2) engages with the top of the deformation hole of the embedded waterstop (3), and then connect the first template (1) to the second template (2), and connect the two ends of the second template (2) to the side mold respectively.

2. The construction method according to claim 1, characterized in that, Step C further includes: before setting the side formwork, attaching an external waterstop (15) to the construction joint position of the side formwork corresponding to the side wall; after setting the side formwork, setting a clamping structure (14) between the external waterstop (15) and the side wall reinforcement, and adjusting the clamping structure (14) so ​​that the clamping structure (14) abuts against the external waterstop (15).

3. The construction method according to claim 1, characterized in that, After the first template (1) is installed, an air extraction pipe (13) is inserted into the preset position of the first template (1). The air extraction pipe (13) is inclined and is located at the bottom of the first side of the embedded waterstop (3), and its end does not extend beyond the first side end of the embedded waterstop (3).

4. The construction method according to claim 1, characterized in that, The first template (1) is provided with a first fixing structure (5), and the second template (2) is provided with a second fixing structure (6); the first fixing structure (5) includes a first horizontal plate (500), a first vertical plate (501) and a first support plate (503), a first protruding plate (502) is provided at the bottom of the first template (1) or the bottom of the first horizontal plate (500), and a support rod (504) is vertically provided at the top of the first support plate (503); the second fixing structure (6) includes a second horizontal plate (600), the first end of the second horizontal plate (600) is connected to the second template (2), and the second end of the second horizontal plate (600) is sleeved with the support rod (504); the support rod (504) is also provided with an adjusting nut (601), and the adjusting nut (601) is provided at the top of the second horizontal plate (600).

5. The construction method according to claim 4, characterized in that, The connection process between the first template (1) and the second template (2) includes: passing the top of the support rod (504) through the second horizontal plate (600), detachably connecting the bottom of the support rod (504) to the first support plate (503) by bolts, inserting the adjusting nut (601) from the top of the support rod (504), and adjusting the adjusting nut (601) to make the second template (2) press the embedded waterstop (3).

6. The construction method according to claim 5, characterized in that, Before the top of the support rod (504) passes through the second horizontal plate (600), the first end of the second clamping plate (506) is inserted into the first clamping plate (505) at the top of the first template (1) via the second end of the first clamping plate (505). The first end of the first clamping plate (505) is rotatably connected to the first template (1), and the second end of the second clamping plate (506) is rotatably connected to the first connecting plate (507). The first end of the fourth clamping plate (604) is inserted into the second end of the third clamping plate (603). The third clamping plate (603) at the top of the second template (2) is rotatably connected to the second template (2), and the second end of the fourth clamping plate (604) is rotatably connected to the second connecting plate (605). After the first sleeve (508) is inserted into the support rod (504), the top of the support rod (504) passes through the first connecting plate (507) and the second connecting plate (605) from bottom to top, and then the second sleeve (606) is inserted into the support rod (504).

7. The construction method according to claim 1, characterized in that, Before installing the second template (2), insert the sealant (12) into the second cavity of the second fixing block (11), pass the second connecting rod (11a) on the second fixing block (11) through the corresponding fixing hole on the second template (2), and fix the second connecting rod (11a) on the second template (2) with a nut so that the surface of the second fixing block (11) fits the inner side of the second template (2), and the second fixing block (11) is installed at the bottom of the second template (2).

8. The construction method according to claim 2, characterized in that, The clamping structure (14) includes a clamping plate (141). A through hole (144) is coaxially provided in the center of the clamping plate (141). First bosses (142) for engaging with the recesses at both ends of the externally attached waterstop (15) are provided at the left and right ends of the clamping plate (141). The first bosses (142) are integrally formed at the bottom of the clamping plate (141). A second boss (143) for abutting against the deformation hole in the center of the externally attached waterstop (15) is provided in the center of the clamping plate (141). 3) It is integrally set at the bottom of the card plate (141), and the two second protrusions (143) are respectively set at the front and rear ends of the card plate (141); the card plate (141) is provided with multiple connecting holes, the connecting holes extend axially from the top of the card plate (141) into the first protrusion (142), and the connecting holes also extend axially from the top of the card plate (141) into the second protrusion (143); the card plate (141) is connected to the first end of the connecting rib (145), and the second end of the connecting rib (145) is connected to the main rib (16).

9. The construction method according to claim 8, characterized in that, The adjustment process of the clamping structure (14) includes: making the first boss (142) of the clamping plate (141) face the notch of the externally attached waterstop (15), and the second boss (143) face the deformation hole of the externally attached waterstop (15); inserting the connecting bar (145) into the connecting hole of the clamping plate (141); adjusting the length of the connecting bar (145); after the first end of the connecting bar (145) abuts against the clamping plate (141), connecting the second end of the connecting bar (145) to the main bar (16) of the side wall of the pipe gallery.

Images