CN113323017B - Construction method of side wall fertilizer groove foam concrete backfill system - Google Patents

Abstract

The invention relates to a construction method of a side wall fertilizer groove foam concrete backfill system, which comprises the following steps: 1) When the bottom plate of the basement is constructed, constructing and driving a plurality of anti-floating piles below the bottom plate; 2) Constructing a waterproof curtain at the bottom of a foundation pit of a fertilizer groove of a basement, and then constructing a clay impermeable layer on the bottom surface and the slope surface of the foundation pit of the fertilizer groove; 3) Welding and fixing the prefabricated triangular anti-floating frame on the outer wall through horizontal anchoring ribs; 4) After the maintenance of the foam concrete layer is finished, installing an L-shaped water stopping system on the outer wall side of the top surface of the foam concrete layer by using a water stopping bolt; 5) And adhering the lateral waterproof coiled material to the surfaces of the outer wall and the waterproof concrete layer at the corner between the outer wall and the waterproof concrete layer. The beneficial effects of the invention are: according to the invention, the underground water layer is blocked from exchanging by arranging the waterproof curtain, the stratum stability is improved, and the whole fertilizer tank backfill structure can prevent water and seepage by arranging the sandwich impermeable membrane and the clay impermeable layer, so that the backfill quality is ensured.

Description

Construction method of foam concrete backfill system for side wall fertilizer tank

technical field

The invention relates to the technical field of building construction, in particular to a construction method of a foam concrete backfill system for a side wall fertilizer tank.

Background technique

With the development of cities, my country's construction industry has developed rapidly. The quantity, scale, type, regional distribution and modernization level of Chinese modern architecture have broken through the limitations of modern times, showing a new attitude. At present, all kinds of buildings, especially large buildings, are generally designed with basement structures, and foundation pits of different depths need to be excavated. The fertilizer tank foundation pit is the part that is excavated more to provide a working surface. Generally, it refers to the space between the outer wall of the basement of the building or the outer wall of the foundation and the edge of the foundation pit. Therefore, timely backfilling of the fertilizer tank and anti-seepage of groundwater need to be considered during basement construction.

my country's geology is complex, and it is inevitable to encounter water-rich strata during construction, and groundwater drainage is difficult. Not only anti-seepage issues, but also anti-floating and anti-settling issues must be considered. The traditional fertilizer tank backfill construction uses lime soil or concrete for layered backfilling. The process is cumbersome and the construction speed is slow. At the same time, only waterproof membranes are laid on the outer wall for anti-seepage. The effect of anti-floating and anti-settling is poor, which not only affects the quality of the building itself, but also affects the safety of surrounding buildings, roads, municipal pipe networks and other facilities.

Therefore, it is very important to seek a construction method for the side wall fertilizer tank foam concrete backfill system with reasonable structure, good overall anti-seepage effect and anti-floating and anti-settling.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art and provide a construction method for the foam concrete backfill system of the side wall fertilizer tank.

This side wall fat groove foam concrete backfill system includes bottom plate, anti-floating pile, outer wall, anchor connecting bar, L-shaped water stop system, horizontal anchor bar, side waterproof membrane, drainage blind ditch, waterproof concrete layer, vertical Anti-floating reinforcement, triangular anti-floating frame, foam concrete layer, sandwich anti-seepage membrane, clay anti-seepage layer and water-stop curtain, the anti-floating pile is arranged under the bottom plate of the basement, and the water-stop curtain is arranged At the bottom, the trench foundation pit is located on one side of the bottom plate, the clay anti-seepage layer is arranged on the bottom surface of the fertilizer pit foundation pit and the slope surface, the sandwich anti-seepage membrane is arranged on the clay anti-seepage layer, and the foam concrete layer is arranged on the sandwich On the anti-seepage membrane, the triangular anti-floating frame is fixed on the side wall of the basement through horizontal anchor bars, the side wall is set above one side of the bottom plate, the waterproof concrete layer is set on the foam concrete layer, and the L-shaped waterproof The system is set at both ends of the contact surface between the waterproof concrete layer and the foam concrete layer. The L-shaped water-stop system is respectively fixed on the outer wall by water-stop bolts and fixed in the ground layer soil by water-stop screws. The outer wall and waterproof concrete Anchor connection bars are provided between the layers, vertical anti-floating bars are provided between the waterproof concrete layer and the foam concrete layer, the lower end of the vertical anti-floating bars is fixed on the triangular anti-floating frame, and the upper end of the vertical anti-floating bars It is fixed on the reinforcement cage of the waterproof concrete layer, the reinforcement cage is in the shape of narrow at both ends and wide in the middle, the drainage blind ditch is arranged on the outer end of the top surface of the waterproof concrete layer, and the side waterproof coiled material is arranged on the outer wall and waterproof corners of the concrete layer.

As a preference: the L-shaped water-stop system includes a sealant, an L-shaped water-stop strip and a rubber pad, the upper end of the L-shaped water-stop strip is provided with a 45° bend, and the lower end is provided with a 90° bend, and the L-shaped water-stop The strip and the rubber pad are fixed by water-stop bolts or water-stop screws, and the space formed by the 45° bend is injected with sealant.

As a preference: the sandwich anti-seepage membrane is formed by bonding the upper layer of non-woven fabric, the middle layer of anti-seepage membrane and the lower layer of non-woven fabric.

As a preference: a non-woven geotextile, a graded sandstone layer, a leveling layer and a water-permeable ground layer are sequentially arranged above the waterproof concrete layer from bottom to top.

As a preference: the upper slope of the L-shaped water-stop system on the slope side of the fertilizer groove foundation pit is fixed with water-stop anchoring bars; the reinforcement cage includes stirrups and main bars, one end of the main bar is welded to the anchoring bar, and the other end is connected to the water-stop The anchor bars are welded and fixed, and the main bars at the bottom of the reinforcement cage are connected to the vertical anti-floating bars by welding or binding.

The construction method of the foam concrete backfill system of the side wall fertilizer tank comprises the following steps:

1) When constructing the floor of the basement, lay a certain number of anti-floating piles under the floor, and then when constructing the outer wall of the basement, pre-buried and installed anchor connecting bars and horizontal anchor bars at the corresponding positions of the outer wall at a certain distance;

2) Construct a water-stop curtain at the bottom of the fertilizer tank foundation pit in the basement, then apply a clay anti-seepage layer on the bottom surface of the fertilizer tank foundation pit and the slope surface, and then spread a sandwich anti-seepage membrane on the clay anti-seepage layer. The lower end of the permeable membrane is bent to a certain length and pasted on the outer wall surface, and the upper end of the sandwich impermeable membrane bypasses the clay impermeable layer and is embedded in the soil of the ground layer to a certain depth;

3) The triangular anti-floating frame prepared in advance is welded and fixed on the outer wall through the horizontal anchor bars, and the lower end of the vertical anti-floating bars is welded and fixed on the triangular anti-floating frame, and then the foam concrete is poured in the pouring area by a foam concrete conveyor to the design height to form a foam concrete layer;

4) After the maintenance of the foam concrete layer is completed, install the L-shaped water-stop system on the outer wall side of the top surface with water-stop bolts, and at the same time install the L-shaped water-stop system with the water-stop screw on the slope side of the fertilizer tank foundation pit, and then install the L-shaped water-stop system on the side of the fertilizer pit. Fix the water-stop anchor bars on the upper slope of the L-shaped water-stop system on the slope side of the trench foundation pit, and then bind the reinforcement cage of the waterproof concrete layer on the foam concrete layer, and weld the main reinforcement end of the reinforcement cage to the anchor connection reinforcement. The other end is welded and fixed with the water-stop anchor bar, and then the main bar at the bottom of the steel cage is welded or tied to the vertical anti-floating bar, and then concrete is poured above the foam concrete layer to form a waterproof concrete layer with a certain slope on the top surface, and the waterproof A groove is reserved at the lower part of the top surface of the concrete layer, and gravel or pebbles are filled in the groove after curing to form a drainage blind ditch;

5) At the angle between the outer wall and the waterproof concrete layer, use thermal bonding to stick the side waterproof membrane on the surface of the outer wall and the waterproof concrete layer, and then lay a layer of non-woven geotextile on the waterproof concrete layer , then pave and fill a layer of graded sand and gravel, then lay a leveling layer and a permeable ground layer, and finally level with the original ground layer, and complete the construction of the foam concrete backfill structure for the fertilizer tank of the basement exterior wall in the water-rich stratum.

The beneficial effects of the present invention are:

1. In the present invention, the communication of the groundwater layer is blocked by setting a water-stop curtain to improve the stability of the formation, and then the backfill structure of the fertilizer tank can be waterproof and anti-seepage as a whole by setting a sandwich anti-seepage membrane and a clay anti-seepage layer, ensuring the quality of backfill and technical benefits The advantages are obvious.

2. In the present invention, by setting anchor connecting bars, vertical anti-floating bars, and triangular anti-floating frames, the integrity of the backfill structure of the fertilizer tank and the basement is enhanced. At the same time, light foam concrete is mainly backfilled to reduce self-weight and later settlement. The floating pile improves the anti-floating effect of the backfill structure of the fertilizer tank.

3. The drainage blind ditch provided by the present invention effectively eliminates surface water seepage, and the L-shaped water-stop system provided in addition not only prevents seepage and damage of the water body, but also improves the overall anti-floating and anti-settling effects of the fertilizer tank and the basement.

Description of drawings

Fig. 1 is the schematic diagram of the foamed concrete backfill system of the fertilizer groove of the side wall;

Fig. 2 is the cross-sectional schematic view of basement and fertilizer tank foundation pit;

Fig. 3 is a schematic diagram of the layout of the anti-seepage structure at the bottom of the foundation pit of the fertilizer tank;

Fig. 4 is the structural representation of foam concrete layer;

Fig. 5 is a structural schematic diagram of an L-shaped water stop system;

Fig. 6 is the connection detailed diagram of reinforcement cage and lower vertical anti-floating reinforcement;

Fig. 7 is the plane layout drawing of reinforcement cage and L-shaped water-stop system;

Fig. 8 is a structural schematic diagram of the waterproof concrete layer.

Explanation of reference signs: 1—bottom plate; 2—anti-floating pile; 3—outer wall; 4—anchor connection bar; 5—L-shaped water stop system; 6—horizontal anchor bar; 7—side 8—non-woven geotextile; 9—graded sand and gravel layer; 10—leveling layer; 11—permeable ground layer; 12—ground layer; 13—drainage blind ditch; 14— —waterproof concrete layer; 15—waterstop screw; 16—vertical anti-floating reinforcement; 17—triangular anti-floating frame; 18—foam concrete layer; 19—sandwich anti-seepage membrane; 20—clay anti-seepage layer; 21—waterproof curtain; 22—sealant; 23—waterproof bolt; 24—L-shaped waterstop strip; 25—rubber pad; 26—fat tank foundation pit; 27—reinforcing cage ; 28—stirrup; 29—main reinforcement; 30—water stop anchoring reinforcement.

Detailed ways

The present invention will be further described below in conjunction with the examples. The description of the following examples is provided only to aid the understanding of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Embodiment one

The foamed concrete backfill system for the fat tank of the side wall comprises a base plate 1, an anti-floating pile 2, an outer wall 3, an anchor connecting bar 4, an L-shaped water stop system 5, a horizontal anchor bar 6, a side waterproof coiled material 7, Textile geotextile 8, graded sand layer 9, leveling layer 10, permeable ground layer 11, drainage blind ditch 13, waterproof concrete layer 14, vertical anti-floating reinforcement 16, triangular anti-floating frame 17, foam concrete layer 18, sandwich The anti-seepage film 19, the clay anti-seepage layer 20 and the water-stop curtain 21, the anti-floating pile 2 is arranged under the bottom plate 1 of the basement, the water-stop curtain 21 is arranged at the bottom of the foundation pit 26, and the foundation pit 26 is located on the bottom plate 1 side, the clay anti-seepage layer 20 is arranged on the bottom surface of the fertilizer tank foundation pit 26 and the slope surface, the sandwich anti-seepage membrane 19 is arranged on the clay anti-seepage layer 20, and the foam concrete layer 18 is arranged on the sandwich anti-seepage On the permeable membrane 19, the triangular anti-floating frame 17 is fixed on the side wall 3 of the basement through the horizontal anchor bar 6, the side wall 3 is arranged above the bottom plate 1 side, and the waterproof concrete layer 14 is arranged on the foam concrete layer 18, The L-shaped water-stop system 5 is arranged at both ends of the contact surface between the waterproof concrete layer 14 and the foam concrete layer 18, and the L-shaped water-stop system 5 is respectively fixed on the outer wall 3 by the water-stop bolt 23 and fixed on the outer wall 3 by the water-stop screw rod 15. In the soil body of the ground layer 12, an anchor connection bar 4 is provided between the outer wall 3 and the waterproof concrete layer 14, and a vertical anti-floating bar 16 is provided between the waterproof concrete layer 14 and the foam concrete layer 18. The lower end of the vertical anti-floating reinforcement 16 is fixed on the triangular anti-floating frame 17, and the upper end of the vertical anti-floating reinforcement 16 is fixed on the reinforcement cage 27 of the waterproof concrete layer 14. The reinforcement cage 27 is in the shape of two narrow ends and a wide middle. The drainage blind ditch 13 is arranged at the outer end of the top surface of the waterproof concrete layer 14, and the side waterproof coiled material 7 is arranged at the corner of the outer wall 3 and the waterproof concrete layer 14, and the above waterproof concrete layer 14 is sequentially arranged from bottom to top. A non-woven geotextile 8 , a graded sandstone layer 9 , a leveling layer 10 and a water-permeable ground layer 11 are set.

The L-shaped water-stop system 5 includes a sealant 22, an L-shaped water-stop strip 24 and a rubber pad 25. The upper end of the L-shaped water-stop strip 24 is provided with a 45° bend, and the lower end is provided with a 90° bend. After the water-stop strip 24 and the rubber pad 25 are fixed by the water-stop bolt 23 or the water-stop screw 15, the sealant 22 is injected into the space formed by the 45° bend.

The sandwich anti-seepage membrane 19 is formed by bonding the upper layer of non-woven fabric, the middle layer of anti-seepage membrane and the lower layer of non-woven fabric.

Above the waterproof concrete layer 14, a non-woven geotextile 8, a graded sandstone layer 9, a leveling layer 10 and a water-permeable ground layer 11 are sequentially arranged from bottom to top.

The L-shaped water-stop system 5 on the slope side of the fertilizer groove foundation pit 26 is placed on the slope surface above the fixed water-stop anchor bar 30; the reinforcement cage 27 includes a stirrup bar 28 and a main bar 29, and one end of the main bar 29 is welded to the anchor bar 4, The other end is welded and fixed with the water-stop anchoring rib 30, and the main rib 29 at the bottom of the reinforcement cage 27 is welded or tied to the vertical anti-floating rib 16.

Embodiment two

The construction method of the foamed concrete backfill system of the side wall fertilizer tank comprises the following steps:

1) As shown in Figure 2, during the construction of the basement 1, a certain number of anti-floating piles 2 are laid under the basement 1 to enhance the overall stability of the basement, and then when the outer wall 2 of the basement is constructed, a certain distance Respectively pre-buried and installed the anchor connecting bars 4 and the horizontal anchor bars 6 at the corresponding positions of the outer wall 2;

2) As shown in Figure 3, first construct a water-stop curtain 21 at the bottom of the fertilizer tank foundation pit 26 in the basement, then apply a clay anti-seepage layer 20 at the bottom surface of the fertilizer tank foundation pit 26 and the slope surface, and then apply the clay anti-seepage layer on the bottom of the fertilizer tank foundation pit 26. Spread the sandwich anti-seepage film 19 on 20, the lower end of the sandwich anti-seepage film 19 is bent to a certain length and pasted on the wall surface of the outer wall 3, and the upper end of the sandwich anti-seepage film 19 bypasses the clay anti-seepage layer 20 and is buried in the ground layer 12 soil until a certain length depth;

3) As shown in Figure 4, the triangular anti-floating frame 17 prepared in advance is fixed on the outer wall 3 by welding the horizontal anchor rib 6, and the lower end of the vertical anti-floating rib 16 is welded and fixed on the triangular anti-floating frame 17, and then Utilize the foam concrete conveyor to pour foam concrete to the design height in the pouring area to form the foam concrete layer 18;

4) As shown in Fig. 5, Fig. 6 and Fig. 7, after the curing of the foam concrete layer 18 is completed, the L-shaped water-stop system 5 is installed on the outer wall 3 side of the top surface using the water-stop bolt 23, and at the same time, the foundation pit of the fertilizer tank Install the L-shaped water-stop system 5 on the side of the 26 slope by using the water-stop screw 15, and then install and fix the water-stop anchor rib 30 on the slope above the L-shaped water-stop system 5 on the slope side of the fertilizer tank foundation pit 26, and then place a fixed water-stop anchor bar 30 on the foam concrete layer 18 Bind the reinforcement cage 27 of the waterproof concrete layer 14, and weld one end of the main reinforcement 29 of the reinforcement cage 27 with the anchor connection reinforcement 4, and weld and fix the other end with the water-stop anchor reinforcement 30, and then connect the main reinforcement 29 at the bottom of the reinforcement cage 27 with the vertical Welding or binding to the anti-floating reinforcement 16, then pouring concrete above the foam concrete layer 18 to form a waterproof concrete layer 14 with a certain slope on the top surface, and reserve a groove at the lower part of the top surface of the waterproof concrete layer 14 until the maintenance is completed Fill gravel or pebbles in the groove to form drainage blind ditch 13;

5) As shown in Figure 1, at the angle between the outer wall 3 and the waterproof concrete layer 14, the side waterproof coiled material 7 is adhered to the surface of the outer wall 3 and the waterproof concrete layer 14 by means of thermal bonding, and then waterproofed A layer of non-woven geotextile 8 is first laid on the top of the concrete layer 14, followed by a layer of graded sand and gravel layer 9, and then a leveling layer 10 and a permeable ground layer 11 are laid, and finally flush with the original ground layer 12 to complete the water-rich stratum The construction of foam concrete backfill structure for the fertilizer tank of the basement exterior wall.

Claims (1)

1. A construction method of a side wall fertilizer tank foam concrete backfill system is characterized in that, comprising the following steps: 1) During the construction of the bottom plate (1) of the basement, lay a certain number of anti-floating piles (2) under the bottom plate (1), and then when constructing the outer wall (3) of the basement, separate them at a certain distance on the outer wall ( 3) Pre-embed and install the anchor connecting ribs (4) and horizontal anchor ribs (6) at the corresponding positions; 2) Construct a water-stop curtain (21) at the bottom of the fertilizer tank foundation pit (26) in the basement, and then apply a clay anti-seepage layer (20) on the bottom surface of the fertilizer tank foundation pit (26) and the slope Spread the sandwich anti-seepage membrane (19) on the seepage layer (20), the lower end of the sandwich anti-seepage membrane (19) is bent to a certain length and pasted on the wall surface of the outer wall (3), and the upper end of the sandwich anti-seepage membrane (19) bypasses the clay for anti-seepage The layer (20) is embedded in the soil of the ground layer (12) to a certain depth; 3) The triangular anti-floating frame (17) made in advance is welded and fixed on the outer wall (3) through the horizontal anchoring rib (6), and the lower end of the vertical anti-floating rib (16) is welded and fixed on the triangular anti-floating frame (17 ), and then use the foam concrete conveyor to pour foam concrete to the design height in the pouring area to form a foam concrete layer (18); 4) After the maintenance of the foam concrete layer (18) is completed, install the L-shaped water-stop system (5) on the outer wall (3) side of the top surface using the water-stop bolt (23), Use the water-stop screw (15) to install the L-shaped water-stop system (5), and then install and fix the water-stop anchor ribs (30 ), then bind the reinforcement cage (27) of the waterproof concrete layer (14) on the foam concrete layer (18), and weld one end of the main reinforcement (29) of the reinforcement cage (27) to the anchoring connection reinforcement (4), and the other end It is welded and fixed with the water-stop anchor bar (30), and then the main bar (29) at the bottom of the reinforcement cage (27) is welded or tied to the vertical anti-floating bar (16), and then concrete is poured on the foam concrete layer (18) to form There is a certain inclined waterproof concrete layer (14) on the top surface, and a groove is reserved at the lower part of the top surface of the waterproof concrete layer (14). After the maintenance is completed, gravel or pebbles are filled in the groove to form a drainage blind ditch (13 ); 5) At the angle between the outer wall (3) and the waterproof concrete layer (14), use thermal bonding to stick the side waterproof membrane (7) on the surface of the outer wall (3) and the waterproof concrete layer (14) , then lay a layer of non-woven geotextile (8) above the waterproof concrete layer (14), then lay a layer of graded sandstone layer (9), and then lay a leveling layer (10) and a water-permeable ground layer (11), Finally, it is flush with the original ground layer (12), and the construction of the foam concrete backfill structure of the fertilizer groove of the basement external wall in the water-rich stratum is completed.

Images