Anti-leakage structure of construction joint of foundation pit basement outer wall and construction method thereof

Abstract

The application discloses a kind of construction joint anti-seepage structure of foundation pit basement outer wall and its construction method, comprising: lower outer wall, the inner edge of the top surface of lower outer wall is formed with reverse ridge;First grouting pipe, is buried in the middle of the top surface of lower outer wall, first grouting pipe is connected with grouting guide pipe, grouting guide pipe extends to the outside of the inside of lower outer wall;Two water-swelling waterstops, are buried in the top surface of lower outer wall, two water-swelling waterstops are respectively arranged on the opposite sides of first grouting pipe;Upper outer wall, is cast on the top surface of lower outer wall and reverse ridge;Waterproof roll material reinforcing layer, is laid in the construction joint of lower outer wall and upper outer wall;Waterproof roll material layer, is laid in the outside of lower outer wall, waterproof roll material reinforcing layer and upper outer wall.The application solves the method that conventional water-stop steel plate is set in the construction joint of basement outer wall to prevent seepage, the problem that water-stop steel plate is easily rusted and damaged in construction process and affects anti-seepage performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a construction joint anti-seepage structure for a foundation pit basement outer wall and a construction method thereof. BACKGROUND

[0002] The basement outer wall first needs to be constructed to the first layer of side wall to the bottom of the support structure, and a construction joint is arranged at the bottom of the support structure. After the support is removed, the second layer of side wall is constructed. However, due to the reasons such as the chiseling not being in place and the concrete not being vibrated in place, the concrete at the construction joint part has weak self anti-seepage ability. The traditional method is to additionally arrange a water stop steel plate at the construction joint part. However, in the process of removing the support structure, the concrete, materials and the like of the support structure will damage the water stop steel plate. When the water stop steel plate is embedded, it needs to be embedded into the first layer of side wall by 1 / 2. Since the design position of the foundation pit support is close to the top of the bottom plate, the side wall needs to be protruded on the bottom plate surface, which is easy to conflict with the support position, so that the water stop steel plate cannot be embedded into the first layer of side wall by 1 / 2. In addition, due to the long construction time, most of the water stop steel plates are damaged or hand embroidered when the project is delayed. In the process of removing the support structure, the concrete, materials and the like of the support structure will damage the water stop steel plate. The traditional method of using the water stop steel plate to prevent seepage at the construction joint of the foundation pit is not applicable to the basement outer wall. SUMMARY

[0003] In order to overcome the defects of the prior art, a construction joint anti-seepage structure for a foundation pit basement outer wall and a construction method thereof are provided to solve the problem that the conventional method of arranging a water stop steel plate at the construction joint of the basement outer wall for preventing seepage is easy to be rusted and damaged in the construction process, thereby affecting the anti-seepage performance.

[0004] To achieve the above-mentioned purpose, a construction joint anti-seepage structure for a foundation pit basement outer wall is provided, which comprises:

[0005] A lower outer wall, an inner edge of a top surface of the lower outer wall is formed with a reverse ridge;

[0006] A first grouting pipe is embedded in the middle of the top surface of the lower outer wall, the first grouting pipe is connected with a grouting guide pipe, and the grouting guide pipe extends to the outside of the inner side of the lower outer wall;

[0007] Two water-swelling water stop belts are embedded in the top surface of the lower outer wall, and the two water-swelling water stop belts are arranged on the opposite sides of the first grouting pipe, respectively;

[0008] An upper outer wall is poured on the top surface of the lower outer wall and the reverse ridge;

[0009] A waterproof roll material reinforcing layer is arranged at the construction joint of the lower outer wall and the upper outer wall;

[0010] A waterproofing membrane layer is arranged on the outer side of the lower outer wall, the waterproofing membrane reinforcing layer and the upper outer wall.

[0011] Further, the first grouting pipe is arranged along the length direction of the lower outer wall.

[0012] Further, the number of the grouting pipes is multiple, and the multiple grouting pipes are arranged along the length direction of the first grouting pipe.

[0013] Further, a cover joint plate is further included, the cover joint plate is arranged between the waterproofing membrane reinforcing layer and the construction joint, opposite sides of the cover joint plate extend to form a wall attachment plate, one wall attachment plate is embedded in the lower outer wall, and the other wall attachment plate is embedded in the upper outer wall, a sealing space is formed between the cover joint plate and the lower outer wall and the upper outer wall, a second grouting pipe is embedded in the lower outer wall, one end of the second grouting pipe extends into the sealing space, and the other end of the second grouting pipe extends to the outside of the inner side of the lower outer wall.

[0014] Further, an anchoring flange is formed on the side of the wall attachment plate away from the cover joint plate.

[0015] Further, the outer side of the lower outer wall and the upper outer wall is coated with a waterproof coating.

[0016] The application provides a construction method of a construction joint anti-seepage structure of a foundation pit basement outer wall, comprising the following steps:

[0017] A waterproofing membrane reinforcing layer is arranged at the construction joint of the lower outer wall and the upper outer wall;

[0018] A waterproofing membrane layer is arranged on the outer side of the pouring position of the lower outer wall, and a waterproofing membrane reinforcing layer is arranged on the inner side of the waterproofing membrane layer, so that the position of the waterproofing membrane reinforcing layer corresponds to the construction joint between the lower outer wall and the upper outer wall;

[0019] The lower outer wall is poured, and a reverse ridge is formed on the inner edge of the top surface of the lower outer wall;

[0020] The top surface of the lower outer wall is roughened;

[0021] A first grouting pipe and two water-swelling waterstops are respectively installed, so that the first grouting pipe is embedded in the middle of the top surface of the lower outer wall, and the two water-swelling waterstops are arranged on the opposite sides of the first grouting pipe;

[0022] The upper outer wall is poured on the top surface of the lower outer wall and the reverse ridge;

[0023] After the upper layer of the outer wall is solidified, the construction joint between the lower layer of the outer wall and the upper layer of the outer wall is grouted through the grouting guide pipe on the grouting pipe to seal the construction joint.

[0024] The beneficial effect of the present application is that the construction joint anti-seepage structure of the foundation pit basement outer wall adopts the anti-seepage combination method of the water-swelling waterstop, the grouting pipe, the waterproof roll material reinforcing layer and the rebate, a waterproof roll material reinforcing layer is added to the water-facing surface of the construction joint, a certain height of the rebate is poured on the water-back surface when pouring the first layer of outer wall (i.e. the lower layer of the outer wall) concrete, after the support structure is removed, the construction joint part is chiseled and three grooves are chiseled at the same time, and the water-swelling waterstop and the grouting pipe are pre-buried, when pouring the second layer of outer wall (i.e. the upper layer of the outer wall) concrete, the waterstop swells to seal the construction joint, after the new concrete is poured, the construction joint is sealed again through the grouting pipe, and at the same time, the construction joint cross section is not on the same horizontal plane through the rebate, so that the anti-seepage ability is strengthened.

[0025] The construction joint anti-seepage structure of the foundation pit basement outer wall can effectively prevent groundwater seepage, without pre-buried waterstop steel plate when pouring the lower layer of the outer wall, avoiding the damage of the waterstop steel plate during construction, the measures are not limited by the position of the support structure, the pouring time and the construction conditions, and the practicability is relatively strong. BRIEF DESCRIPTION OF DRAWINGS

[0026] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments with reference to the following drawings:

[0027] Figure 1 FIG. 1 is a structural schematic diagram of the construction joint anti-seepage structure of the foundation pit basement outer wall according to the embodiment of the present application.

[0028] Figure 2 FIG. 2 is a structural schematic diagram of the cover joint plate according to the embodiment of the present application. DETAILED DESCRIPTION

[0029] The present application will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related application, but not to limit the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for the convenience of description.

[0030] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and embodiments.

[0031] REFERENCE Figure 1 and Figure 2As shown, the present application provides a kind of construction joint anti-seepage structure of foundation pit basement outer wall, comprising: lower outer wall 1, first grouting pipe 2, water-swelling waterstop 3, upper outer wall 4, waterproof roll material reinforcement layer 5, waterproof roll material layer 6.

[0032] Wherein, lower outer wall 1 is poured on the bottom of basement structure.The inner edge of the top surface of lower outer wall 1 is formed with reverse ridge 11.Reverse ridge and the top surface of lower outer wall form a rebate.

[0033] First grouting pipe 2 is buried in the middle of the top surface of lower outer wall 1.First grouting pipe 2 is connected with grouting guide pipe.Grouting guide pipe extends to the outside of the inside of lower outer wall 1.

[0034] Specifically, first grouting pipe 2 is arranged along the length direction of lower outer wall 1.

[0035] In this embodiment, the number of grouting guide pipes is multiple.The multiple grouting guide pipes are arranged at intervals along the length direction of first grouting pipe 2.The buried interval of grouting guide pipe is 5-6 m.

[0036] The number of water-swelling waterstop 3 is two.Two water-swelling waterstop 3 are buried in the top surface of lower outer wall 1.Two water-swelling waterstop 3 are arranged on the opposite sides of first grouting pipe 2.

[0037] Upper outer wall 4 is poured on the top surface of lower outer wall 1 and reverse ridge 11.

[0038] Waterproof roll material reinforcement layer 5 is laid at the construction joint of lower outer wall 1 and upper outer wall 4.

[0039] Waterproof roll material layer 6 is laid on the outside of lower outer wall 1, waterproof roll material reinforcement layer 5 and upper outer wall 4.

[0040] As a preferred embodiment, the construction joint anti-seepage structure of foundation pit basement outer wall further comprises cover joint plate 7.Cover joint plate 7 is arranged between waterproof roll material reinforcement layer 5 and construction joint.The opposite sides of cover joint plate 7 extend to form attached wall plate 71.One attached wall plate 71 is buried in lower outer wall 1.The other attached wall plate 71 is buried in upper outer wall 4.Cover joint plate 7 and lower outer wall 1, upper outer wall 4 form sealing space.Second grouting pipe 8 is buried in lower outer wall 1.One end of second grouting pipe 8 extends into sealing space.The other end of second grouting pipe 8 extends to the outside of the inside of lower outer wall 1.

[0041] After the solidification of upper outer wall, cement slurry is injected into sealing space through second grouting pipe.Cement slurry is solidified in cover joint plate to form sealing layer, which is used to seal construction joint.The anti-seepage performance of construction joint is improved by cover joint plate and sealing layer.

[0042] The side of attached wall plate 71 away from cover joint plate 7 is formed with anchoring flange 72.

[0043] In the embodiment, the wall-attached plate is arranged perpendicularly to the cover joint plate, and the anchoring flange is arranged in the same direction as the cover joint plate.

[0044] In some embodiments, the outer side of the lower outer wall 1 and the upper outer wall 4 is coated with a waterproof coating. Specifically, the waterproof coating is polyurethane paint.

[0045] The present application provides a construction method of a construction joint anti-seepage structure of a foundation pit basement outer wall, comprising the following steps:

[0046] S1, the waterproof material reinforcing layer 5 is laid at the construction joint of the lower outer wall 1 and the upper outer wall 4.

[0047] S2, the waterproof material layer 6 is arranged on the outer side of the pouring position of the lower outer wall 1, and the waterproof material reinforcing layer 5 is arranged on the inner side of the waterproof material layer 6, so that the position of the waterproof material reinforcing layer 5 corresponds to the construction joint between the lower outer wall 1 and the upper outer wall 4.

[0048] In the embodiment, before pouring the lower outer wall, the cover joint plate and the second grouting pipe are arranged on the inner side of the waterproof material reinforcing layer. After pouring the lower outer wall, the wall-attached plate on the lower side of the cover joint plate and the anchoring flange are embedded in the lower outer wall, and the other part of the second grouting pipe extending to the inner side of the lower outer wall is outside.

[0049] S3, the lower outer wall 1 is poured, and the reverse ridge 11 is formed on the inner edge of the top surface of the lower outer wall 1.

[0050] S4, the top surface of the lower outer wall 1 is roughened.

[0051] S5, the first grouting pipe 2 and the two water-swelling sealing belts 3 are respectively installed, so that the first grouting pipe 2 is embedded in the middle of the top surface of the lower outer wall 1, and the two water-swelling sealing belts 3 are respectively arranged on the opposite sides of the first grouting pipe 2.

[0052] S6, the upper outer wall 4 is poured on the top surface of the lower outer wall 1 and the reverse ridge 11.

[0053] When pouring the upper outer wall, the wall-attached plate on the upper side of the cover joint plate and the anchoring flange are embedded in the upper outer wall, and the cover joint plate 7 forms a sealing space between the lower outer wall 1 and the upper outer wall 4.

[0054] S7, after the upper outer wall 4 is solidified, the construction joint between the lower outer wall 1 and the upper outer wall 4 is grouted through the grouting guide pipe on the grouting pipe to seal the construction joint.

[0055] After the upper outer wall is solidified, the sealing layer is formed by pouring cement slurry into the sealing space through the second grouting pipe.

[0056] The construction joint anti-seepage structure of the foundation pit basement outer wall of the application adopts the anti-seepage combination method of the water-swelling waterstop, the grouting pipe, the waterproof roll material reinforcing layer and the rebate, adds a waterproof roll material reinforcing layer on the water-facing surface of the construction joint, pours the rebate of a certain height on the water-back surface when pouring the first layer of outer wall (i.e. the lower layer of outer wall), chisels the construction joint part and three grooves after the support structure is removed, and pre-buries the water-swelling waterstop and the grouting pipe, the waterstop swells and closes the construction joint when pouring the second layer of outer wall (i.e. the upper layer of outer wall), the new concrete is poured, and the construction joint is closed again through the grouting pipe after pouring, and the construction joint section is not on the same horizontal plane through the rebate, so that the anti-seepage capacity is strengthened.

[0057] The construction joint anti-seepage structure of the foundation pit basement outer wall of the application is not limited by the position of the support structure, the pouring time and the construction condition, and has strong practicability.

[0058] The construction joint anti-seepage structure of the foundation pit basement outer wall of the application is convenient to construct through the addition of the waterproof roll material reinforcing layer, the waterstop, the grouting pipe and the rebate, and can be fine-tuned according to the position during the construction process.

[0059] The construction joint anti-seepage structure of the foundation pit basement outer wall of the application can effectively prevent the seepage of underground water, does not need to pre-bury the waterstop steel plate when pouring the lower layer of outer wall, avoids the damage of the waterstop steel plate during the construction process, and has strong practicability.

[0060] The above description is only the preferred embodiment of the application and the explanation of the applied technical principles. It should be understood by those skilled in the art that the application range involved in the application is not limited to the technical solutions formed by the specific combination of the above technical features, and also covers other technical solutions formed by the arbitrary combination of the above technical features or equivalent features without departing from the inventive concept. For example, the technical solutions formed by the mutual replacement of the above features and the technical features disclosed in the application (but not limited to) having similar functions.

Claims

1. A construction joint leakproofing structure for an excavation basement exterior wall, characterized by, The application relates to a waterproofing structure of a building, which comprises: a lower outer wall, the inner edge of the top surface of which is formed with a reverse ridge; a first grouting pipe, which is embedded in the middle of the top surface of the lower outer wall, and is connected with a grouting guide pipe, which extends to the outside of the inner side of the lower outer wall; two water-swelling sealing belts, which are embedded in the top surface of the lower outer wall and are arranged on the opposite sides of the first grouting pipe respectively; an upper outer wall, which is cast on the top surface of the lower outer wall and the reverse ridge; a waterproofing membrane reinforcing layer, which is arranged at the construction joint of the lower outer wall and the upper outer wall; a waterproofing membrane layer, which is arranged on the outer side of the lower outer wall, the waterproofing membrane reinforcing layer and the upper outer wall; a cover joint plate, which is arranged between the waterproofing membrane reinforcing layer and the construction joint, and the opposite sides of the cover joint plate are extended to form wall-attached plates, one of which is embedded in the lower outer wall and the other of which is embedded in the upper outer wall, and the cover joint plate and the lower outer wall and the upper outer wall form a sealing space, and a second grouting pipe is embedded in the lower outer wall, one end of the second grouting pipe extends into the sealing space, and the other end of the second grouting pipe extends to the outside of the inner side of the lower outer wall.

2. The construction joint leak protection structure for a foundation pit basement exterior wall according to claim 1, characterized by, The first grouting pipe is arranged along the length direction of the lower outer wall.

3. The construction joint leak protection structure for the exterior wall of a basement according to claim 2, wherein The number of the grouting guide pipes is plural, and the plural grouting guide pipes are arranged along the length direction of the first grouting pipe.

4. The anti-leakage structure for construction joints of a basement exterior wall according to claim 1, wherein The side, which is away from the cover joint plate, of the wall-attached plate is formed with an anchoring flange.

5. The anti-leakage structure for construction joints of a basement exterior wall according to claim 1, wherein The outer side of the lower outer wall and the upper outer wall is coated with a waterproofing coating.

6. A construction method of a construction joint leakproof structure of an excavation basement exterior wall according to any one of claims 1 to 5, characterized in that, The application further relates to a construction method of the waterproofing structure of the building, which comprises the following steps: arranging the waterproofing membrane reinforcing layer at the construction joint of the lower outer wall and the upper outer wall; arranging the waterproofing membrane layer on the outer side of the lower outer wall and arranging the waterproofing membrane reinforcing layer on the inner side of the waterproofing membrane layer, so that the position of the waterproofing membrane reinforcing layer corresponds to the construction joint between the lower outer wall and the upper outer wall; casting the lower outer wall and forming the reverse ridge on the inner edge of the top surface of the lower outer wall; roughening the top surface of the lower outer wall; respectively arranging the first grouting pipe and the two water-swelling sealing belts, so that the first grouting pipe is embedded in the middle of the top surface of the lower outer wall, and the two water-swelling sealing belts are arranged on the opposite sides of the first grouting pipe respectively; casting the upper outer wall on the top surface of the lower outer wall and the reverse ridge; after the upper outer wall is solidified, the construction joint between the lower outer wall and the upper outer wall is grouted through the grouting guide pipe on the grouting pipe to seal the construction joint.

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