CN107326940B - A kind of basement structure and construction method - Google Patents

Abstract

The invention discloses an advanced water stop post-cast strip structure of basements and a construction method thereof, wherein the advanced water stop post-cast strip structure comprises a left basement main body structure, a right basement main body structure, a post-cast strip area and a cast-in-place concrete trapezoidal groove structure arranged below the post-cast strip, and a waterproof coil layer, a polyurethane waterproof coating layer, a waterproof protective layer and a concrete cushion layer are sequentially arranged below the basement main body structure and the cast-in-place concrete trapezoidal groove structure.

Description

A kind of basement structure and construction method

technical field

The invention relates to the field of construction engineering, in particular to a basement structure with an advanced water-stop and post-casting belt structure and a construction method thereof.

Background technique

Since the reform and opening up, especially in the past ten years, my country's social economy has developed rapidly, the scale of construction has become increasingly large, and the structural types have become more complex and diverse, especially the super-long and super-deep basement structures and the connection between high-rise main buildings and low-rise or multi-storey podium buildings. There are many structural forms, which requires a post-cast belt structure. At present, there are some post-casting and advanced water-stop constructions, but these advanced water-stop constructions are prone to leakage, cracks, sludge accumulation, water accumulation, uneven surface, poor flatness and debris cleaning in the post-casting zone. difficulties, etc.

SUMMARY OF THE INVENTION

The object of the present invention is to overcome the defects of the prior art, and provide a kind of basement advanced water-stop and back-casting belt structure, and the technical scheme of the basement advanced water-stop and back-casting belt structure is realized in this way:

A basement advanced water-stop and post-pouring belt structure, comprising a left and right basement main structure and a middle post-pouring belt, the soil facing surface of the basement advanced water-stop and post-pouring belt structure is also provided with a cast-in-place concrete trapezoidal groove structure, and the basement The outer sides of the main structure, the intermediate post-casting belt and the trapezoidal groove structure are sequentially provided with a waterproof roll material layer, a waterproof coating film layer and a waterproof protective layer.

The cast-in-place concrete trapezoidal groove structure has a near-soil side stressed steel bar penetrated into the left and right basement main structures, an expansion joint is arranged in the middle of the trapezoidal groove structure, and a U-shaped joint is arranged at the proximal end of the expansion joint and the intermediate post-cast belt. Reinforcing bars, externally attached waterstops are arranged on both sides of the expansion joint, and a back-attached waterstop is arranged at the far end near the soil side, and the interior of the expansion joint is filled with asphalt and oil hemp.

A C-type water-stop steel plate is arranged at the middle parts of both sides of the intermediate post-casting belt, the C-type water-stop steel plate is arranged perpendicular to the main structure and the post-cast belt, and a water-swellable water-stop strip is arranged on the outer side of the C-type water-proof steel plate. There are also dense mesh steel meshes on both sides of the intermediate post-casting belt.

Further, when the main structure is a side wall, high-strength bolts for fixing the blocking structure are reserved on both sides of the main structure.

The concrete of the intermediate post-casting zone is shrinkage-compensated concrete, and the concrete grade is one level higher than that of the basement main structure; the concrete of the basement main structure and the trapezoidal groove structure is integrally cast, and the concrete of the post-cast zone is post-cast.

The main structure of the basement and the inner side of the intermediate post-casting zone are provided with a blocking structure.

Further, the main structure of the basement includes a basement floor and basement side walls. When the basement floor is used, the sealing structure is closed with a glued cover plate, and when it is a side wall, the closed structure is closed with a formwork structure.

The steps of the construction method of the above-mentioned basement bottom plate pouring the belt structure in advance of the water stop are as follows:

(1) First apply the waterproof membrane layer, waterproof coating film layer and waterproof protective layer of the outer layer of the basement floor;

(2) Fabricate and install the trapezoidal groove structure and the main structure of the basement, including the steel bars of the post-casting belt, bind and fix them, support them with horse stool bars, and level and align them;

(3) Lay externally attached water stop belts along both sides and ends of the center line of the expansion joint to form a closed water stop circle at the expansion joint, fill the expansion joint with extruded polystyrene board, and add U during construction The steel bar is used to fix the extruded polystyrene board and the rubber water stop, and effectively locate the extruded polystyrene board and the rubber water stop;

(4) Weld the C-type water-stop steel plate on both sides of the post-casting belt, the direction of the water-stop steel plate is facing the soil face, install the water-swelling water-stop strip, and then weld the steel skeleton on both sides of the post-casting belt, and cover it with dense mesh wire mesh. The steel bars are bound and fixed together with the bottom plate and outer wall steel bars;

(5) Production and installation of the integrated formwork of the bottom plate, and reserve a horizontal water-stop groove;

(6) Pour the concrete of the trapezoidal groove structure, remove the extruded polystyrene board, and use linoleum and asphalt for jointing;

(7) Make a blocking structure; first make brick tapes at both ends of the bottom plate, and then cover the brick tapes with glued cover plates;

(8) After the settlement is basically stable, the shrinkage concrete is added after pouring.

The steps of the construction method of the above-mentioned basement side wall advanced water-stop back-poured belt structure are as follows:

(1) Fabricate and install the trapezoidal groove structure and basement side walls including the steel bars of the post-casting belt, bind and fix them, support them with horse stool bars, and level and align them;

(2) Lay externally attached water stop belts along both sides and ends of the center line of the expansion joint to form a closed water stop circle at the expansion joint, fill the expansion joint with extruded polystyrene board, and add U during construction The steel bar is used to fix the extruded polystyrene board and the rubber water stop, and effectively locate the extruded polystyrene board and the rubber water stop;

(3) Weld the C-type water-stop steel plate on both sides of the post-casting belt, the direction of the water-stop steel plate is facing the soil face, install the water-swelling water-stop strip, and then weld the steel skeleton on both sides of the post-casting belt, and cover it with dense mesh wire mesh. The steel bars are bound and fixed together with the bottom plate and outer wall steel bars;

(4) Production and installation of integrated formwork for side walls, integrated construction of exterior wall advance waterstop with basement exterior wall formwork and concrete, diagonal ties and supports are provided at the dense mesh wire mesh of side walls, and side walls on both sides are post-cast with side walls. Reserve high-strength bolts for fixing the blocking template;

(5) Pour the concrete of the trapezoidal groove structure, remove the extruded polystyrene board, and use linoleum and asphalt for joint; make the waterproof layer of the basement side wall;

(6) Apply a plugging structure; directly fix the template with high-strength bolts reserved on both sides of the main structure to achieve sealing;

(7) After the settlement is basically stable, the shrinkage concrete is added after pouring.

The basement structure of the present invention has the following intentional effects:

(1) Set rubber waterstops on the side and bottom of the expansion joint of the advanced waterstop to form a closed waterstop, and add two horizontal waterstop grooves on the top surface of the bottom plate to form a waterproof structure, which is combined with polyurethane coating waterproof and waterproof membrane The formed waterproof layer together forms multi-layer waterproofing at the position of the pre-production waterstop, which improves the waterproof and impermeability effect. .

(2) Before pouring the concrete, extruded polystyrene board and rubber water-stop are used to set the joints. After pouring, the extruded polystyrene board is cleaned, and the joints are filled with waterproof asphalt and oil hemp to achieve good performance. The waterproof effect also ensures the shrinkage and deformation ability of the post-cast belt.

(3) There are dense mesh wire meshes on both sides of the post-casting belt to prevent vibrating and slurry accumulation during the post-casting concrete, and to ensure the appearance quality of the post-casting belt.

(4) The top surface of the post-casting belt is provided with a blocking structure to prevent the entry of sundries and sewage during the placement of the post-casting belt and avoid secondary cleaning.

Description of drawings

Fig. 1 is the schematic diagram of the back-casting belt structure of the basement advanced water-stop floor of the present invention;

FIG. 2 is a schematic diagram of the structure of the back-casting belt structure of the advanced water-stop side wall of the basement according to the present invention.

Reference numerals: 1- intermediate post-casting belt, 2- basement main structure (including bottom plate and side walls), 3- cast-in-place concrete trapezoidal groove structure, 301-transverse reinforcement, 4-waterproofing membrane layer, 40-polyurethane waterproofing Coating layer, 5-Waterproof protective layer, 6-Concrete cushion, 7-Expansion joint, 71-U-shaped steel bar, 72-Asphalt, oil hemp filling joint, 73-External waterstop on both sides, 74-End External waterstop, 8-horizontal waterstop groove, 8a-high-strength bolt, 9-C-type waterstop steel plate, 10-water-expandable waterstop, 11-blocking structure, 111-brick tape, 112 - Glued cover, 12-mesh wire mesh.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Example 1

As shown in FIG. 1 , a basement bottom plate is constructed with an advanced water-stop and post-casting belt structure, including left and right basement bottom plates 2 and a middle post-casting belt 1, and also includes a cast-in-place concrete trapezoidal groove structure 3 provided below the back-casting belt, and the basement bottom plate 2 The lower part of the cast-in-place concrete trapezoidal groove structure 3 is a waterproof membrane layer 4 , a waterproof coating film layer 40 , a waterproof protective layer 5 and a concrete cushion layer 6 in sequence.

In the specific implementation, the transverse reinforcement bars 301 of the cast-in-place concrete trapezoidal groove structure 3 penetrate deep into the basement floor 2 on the left and right sides, an expansion joint 7 is provided in the middle of the trapezoidal groove structure 3, and the joint end of the expansion joint 7 and the intermediate post-casting belt 1 is provided with The U-shaped steel bars 71 are provided with extruded polystyrene boards inside. After the concrete is poured, the joints are cleaned, and then the joints are filled with asphalt and oil hemp 72. Both sides of the expansion joints 7 are provided with externally attached waterstops 73 on both sides. There is a water stop tape 74 attached to the end, the outer side is connected with the waterproof membrane layer 4 , and two horizontal water stop grooves 8 are also arranged on both sides of the trapezoidal groove structure 3 .

In the specific implementation, a water-stopping steel plate 9 is arranged in the middle of both sides of the middle post-casting belt 1, a water-swelling water-stop strip 10 is arranged below the water-stopping steel plate 9, a dense mesh wire mesh 12 is provided on the vertical side, and the middle post-casting belt 1 The inner side is also provided with a blocking structure 11, including brick belts 111 at both ends and a middle glued cover plate 112. The concrete of the middle post-cast belt 1 is shrinkage compensation concrete, which is post-cast concrete.

During specific implementation, the junction of the plugging structure 11 and the basement floor 2 is plastered and smoothed with cement mortar.

In specific implementation, the trapezoidal groove structure 3 and the concrete of the basement floor 2 are integrally poured.

In specific implementation, both ends of the trapezoidal groove structure 3 are longer than the horizontal length of the straight portion and the broken line portion of the intermediate post-casting belt 1 by not less than 250 mm.

In specific implementation, the strength grade of the post-casting compensation concrete of the intermediate post-cast belt 1 is one level higher than the concrete grade of the basement floor 2 .

The steps of the construction method of the above-mentioned basement bottom plate pouring the belt structure in advance of the water stop are as follows:

(1) First, the concrete cushion layer 6 of the outer layer of the basement floor is applied, and then the waterproof membrane layer 4, the waterproof coating film layer 40 and the waterproof protective layer 5 are applied;

(2) Make and install the trapezoidal groove structure 3 and the basement main structure 2, including the steel bars of the intermediate post-casting belt 1 and binding them to fix them, and support them with horse stool bars, and level and align them;

(3) Lay the outer water stop belts 73 on both sides and the end outer water stop belts 74 along both sides of the center line of the expansion joint 7 to form a closed water stop circle at the expansion joint 7. The place is filled with extruded polystyrene board, and U-shaped steel bar 71 is added during construction to fix the extruded polystyrene board and the rubber waterstop, and effectively locate the extruded polystyrene board and the rubber waterstop;

(4) Weld C-type water-stop steel plates 9 on both sides of the middle post-casting belt 1, the direction of the water-stop steel plate 9 is facing the soil-facing surface, install the water-swellable water-stop strips 10, and then weld the steel skeleton on both sides of the post-casting belt, and the outer packing is sealed. Mesh steel mesh 12, the skeleton steel bars are bound and fixed together with the bottom plate and the outer wall steel bars;

(5) Production and installation of the integrated formwork of the bottom plate, and reserve a horizontal water-stop groove 8;

(6) pouring the concrete of the trapezoidal groove structure 3, removing the extruded polystyrene board, and using linseed and asphalt 72 for jointing;

(7) Make the blocking structure 11; first make brick tapes 111 on both ends of the bottom plate, and then cover the brick tapes with glued cover plates 112;

(8) After the settlement is basically stable, the shrinkage concrete is added after pouring.

Example 2

As shown in Figure 2, a basement side wall advanced water-stop post-casting belt structure includes left and right basement side walls 2 and a middle post-casting belt 1, and also includes a cast-in-place concrete trapezoidal groove structure 3 under the back-casting belt. The outer side of the side wall 2 and the cast-in-place concrete trapezoidal groove structure 3 is a waterproof membrane layer 4 , a waterproof coating film layer 5 , and a waterproof protective layer 6 in sequence.

In the specific implementation, the transverse reinforcement bars 301 of the cast-in-place concrete trapezoidal groove structure 3 penetrate deep into the inner side of the basement side walls 2 on the left and right sides, an expansion joint 7 is provided in the middle of the trapezoidal groove structure 3, and the joint end of the expansion joint 7 and the intermediate post-casting belt 1 is set There are U-shaped steel bars 71, and extruded polystyrene boards are left inside. After the concrete is poured, the joints are cleaned, and then the joints are filled with asphalt and oil hemp 72. Both sides of the expansion joints 7 are provided with externally attached waterstops 73 on both sides. The outer end is provided with an end externally attached waterstop 74 , and the outer side is connected with the waterproof membrane layer 4 .

In specific implementation, a water-stopping steel plate 9 is provided in the middle of both sides of the middle post-casting belt 1, a water-swelling water-stop strip 10 is provided on the outer side of the water-stopping steel plate 9, and a dense mesh wire mesh 12 is vertically arranged in the post-casting belt area 1. High-strength bolts 8 are reserved in the basement side walls 2 on both sides of the post-casting belt 1 for fixing the blocking structure 11. The blocking structure 11 is a blocking template, so that the intermediate post-casting zone 1 forms a closed space; The concrete in Band 1 is post-cast shrinkage-compensated concrete.

During specific implementation, the dense mesh wire mesh 12 is also provided with diagonal bracing and supports.

In specific implementation, the trapezoidal groove structure 3 and the concrete of the basement side wall 2 are integrally poured.

In specific implementation, both ends of the trapezoidal groove structure 3 are longer than the horizontal length of the straight portion and the broken line portion of the intermediate post-casting belt 1 by not less than 250 mm.

In specific implementation, the strength grade of the post-cast compensation concrete of the intermediate post-cast zone 1 is one grade higher than the concrete grade of the basement side wall 2 .

The steps of the construction method of the above-mentioned basement side wall advanced water-stop back-poured belt structure are as follows:

(1) Make and install the trapezoidal groove structure 3 and the basement side wall 2, including the steel bars of the intermediate post-casting belt 1, bind them and fix them, support them with horse stool bars, and level and align them;

(2) Lay the outer water stop belts 73 on both sides and the water stop belts 74 at the ends along both sides of the center line of the expansion joint 7 to form a closed water stop circle at the expansion joint 7. The place is filled with extruded polystyrene board, and U-shaped steel bar 71 is added during construction to fix the extruded polystyrene board and the rubber waterstop, and effectively locate the extruded polystyrene board and the rubber waterstop;

(3) Weld C-type water-stop steel plates 9 on both sides of the middle post-casting belt 1, the direction of the water-stop steel plate 9 is facing the soil surface, install the water-swellable water-stop strips 10, and then weld the steel skeleton on both sides of the post-casting belt 1, outsourcing The dense mesh wire mesh 12, the skeleton steel bar is bound and fixed with the bottom plate and the outer wall steel bar;

(4) Production and installation of integrated formwork for basement side wall 2, integrated construction of exterior wall advance waterstop, basement exterior wall 2 formwork and concrete, 12 dense mesh wire mesh on side wall is provided with diagonal ties and supports, and post-casting belt 1. High-strength bolts 8a are reserved on the side walls 2 on both sides for fixing the blocking formwork 11;

(5) The concrete of the trapezoidal groove structure 3 is poured, the extruded polystyrene board is removed cleanly, and linoleum and asphalt 72 are used for jointing; the waterproof layer of the basement side wall is applied;

(6) Apply the blocking structure 11; directly fix the template with the high-strength bolts 8a reserved in the main structure on both sides to realize the sealing;

(7) After the settlement is basically stable, the shrinkage concrete is added after pouring.

The technical content and technical features of the present invention have been disclosed as above, and those skilled in the art may still make substitutions and modifications based on the teachings of the present invention without departing from the essence of the present invention. Therefore, the protection scope of the present invention is not limited to those disclosed in the embodiments. The content also includes various substitutions and modifications without departing from the essence of the present invention.

Claims (1)

1. a construction method for a basement advanced water-stop post-casting belt structure, comprising the left and right basement main structure and the middle post-casting belt, it is characterized in that: A cast-in-place concrete trapezoidal groove structure is also arranged on the soil-facing surface of the basement's advanced water-stop post-casting belt structure, and the outer sides of the basement main structure, the intermediate post-casting belt and the trapezoidal groove structure are sequentially provided with a waterproof coil layer, Waterproof coating layer and waterproof protective layer; The cast-in-place concrete trapezoidal groove structure has a near-soil side stressed steel bar penetrated into the left and right basement main structures, an expansion joint is arranged in the middle of the trapezoidal groove structure, and a U-shaped joint is arranged at the proximal end of the expansion joint and the intermediate post-cast belt. Reinforcing bars, externally attached waterstops are arranged on both sides of the expansion joint, and a back-attached waterstop is arranged at the far end near the soil side, and the interior of the expansion joint is filled with asphalt and oil hemp; A C-type water-stop steel plate is arranged at the middle parts of both sides of the intermediate post-casting belt, the C-type water-stop steel plate is arranged perpendicular to the main structure and the post-cast belt, and a water-swellable water-stop strip is arranged on the outer side of the C-type water-proof steel plate. There are also dense mesh wire meshes on both sides of the middle post-casting belt; The concrete of the intermediate post-casting zone is shrinkage-compensating concrete, and the concrete grade is higher than that of the basement main structure; the concrete of the basement main structure and the trapezoidal groove structure is integrally cast, and the concrete of the post-cast zone is post-cast; A blocking structure is arranged on the inner side of the basement main structure and the intermediate post-casting zone; The main structure of the basement includes a basement floor and a basement side wall. When it is a basement floor, the blocking structure is closed by a glued cover plate, and when it is a side wall, the blocking structure is closed by a template structure; The steps of the construction method of the pre-water-stopping and post-casting belt structure of the basement are as follows: (1) First apply the waterproof membrane layer, waterproof coating film layer and waterproof protective layer of the outer layer of the basement floor; (2) Fabricate and install the trapezoidal groove structure and the main structure of the basement, including the steel bars of the post-casting belt, bind and fix them, support them with horse stool bars, and level and align them; (3) Lay the outer water stop belt and the back-stick water stop belt at the outer end along both sides of the center line of the expansion joint to form a closed water stop circle at the expansion joint, and extruded polystyrene is used at the expansion joint. The board is filled, and U-shaped steel bars are added during construction to fix the extruded polystyrene board and the rubber waterstop, and effectively locate the extruded polystyrene board and the rubber waterstop; (4) Weld the C-type water-stop steel plate on both sides of the post-casting belt, the direction of the water-stop steel plate is facing the soil face, install the water-swelling water-stop strip, and then weld the steel skeleton on both sides of the post-casting belt, and cover it with dense mesh wire mesh. The steel bars are bound and fixed together with the bottom plate and outer wall steel bars; (5) Production and installation of the integrated formwork of the bottom plate and the side wall, the advanced waterstop of the outer wall and the formwork of the basement exterior wall are constructed in the same integration. High-strength bolts are reserved for fixing the blocking formwork; horizontal water-stop grooves are reserved on the bottom plate; (6) Pour the concrete of the trapezoidal groove structure, remove the extruded polystyrene board, and use linoleum and asphalt to make joints; make the waterproof layer of the basement side wall; (7) Make a blocking structure; the side walls are directly closed with the high-strength bolts reserved for the main structure on both sides to fix the formwork, and the bottom plate is made of brick tapes at both ends, and the brick tapes are covered with glued cover plates; (8) After the settlement is basically stable, the shrinkage concrete is added after pouring.