CN109610516B - Basement exterior wall post-cast strip retaining wall construction method - Google Patents

Abstract

The invention provides a retaining wall construction method at a post-cast strip of an outer wall of a basement, which comprises the following steps: (1) and embedding the reinforcing steel bars of the basement outer wall and the first longitudinal reinforcing steel bars of the reinforced concrete wall pier. (2) And constructing basement outer walls and reinforced concrete wall piles. (3) And constructing a waterproof layer and a waterproof protective layer. (4) And (5) constructing the retaining wall. (5) And backfilling earthwork. This construction mode is through reserving reinforced concrete wall pile when basement outer wall major structure is under construction, then construction is waterproof and the protective layer, and the steel retaining wall is under construction again, with reinforced concrete wall pile as the support of construction retaining wall, has improved the security of retaining wall construction, and reduction of erection time practices thrift the cost, and has avoidd the bar planting on the outer wall simultaneously, destroys waterproofly, has reduced the risk of seepage, practices thrift the cost.

Description

Basement exterior wall post-cast strip retaining wall construction method

Technical Field

The invention belongs to the field of building construction, and particularly relates to a retaining wall construction method at a post-cast strip of an outer wall of a basement.

Background

With the rapid development of cities, modern buildings are developing to a depth and a height in order to improve the land utilization rate, and large basements are usually built in the modern buildings. The large basement mostly adopts the flow construction operation, namely the sectional construction. The earth backfill between the basement outer wall and the foundation pit slope at the position constructed firstly needs to be completed in the shortest time. The purpose is to reduce the cracking of the outer wall of the basement, increase the area of a construction site, enable the construction site to be tidier and the like. The earthwork of the backfill part and the non-backfill part generates a height difference, and measures are needed to be taken to make a retaining wall in order to prevent the backfill soil from forming a slope naturally.

In the prior art, a brick wall is generally built, and a mode of reinforcing the retaining wall by a support frame is adopted, so that the method is complex in construction, difficult in material transportation, various in consumed materials, high in construction cost, large in risk of construction mode and low in reliability; or a mode of planting reinforcing steel bars on the underground outdoor wall to form the shear wall is adopted, the method destroys the waterproof structure of the outer wall, has the risk of leakage, and is not easy to construct in narrow space. Therefore, the prior art has certain safety risks, and the safety risks and the technical risks cannot be avoided.

Disclosure of Invention

Aiming at the problems, the invention provides a retaining wall construction method at a post-cast strip of a basement outer wall, which improves the construction safety of the retaining wall, shortens the construction period, saves the cost, avoids the bar planting on the outer wall, damages the water resistance, reduces the leakage risk and saves the cost by reserving a reinforced concrete wall pier during the construction of a main body structure of the basement outer wall, then constructing a waterproof and protective layer and then constructing a retaining wall and taking the reinforced concrete wall pier as the support of the constructed retaining wall.

The technical problem to be solved by the invention is realized by adopting the following technical scheme:

the basement outer wall post-cast strip retaining wall construction method comprises the following steps:

(1) embedding reinforcing steel bars: and embedding the reinforcing steel bars of the basement outer wall and the first longitudinal reinforcing steel bars of the reinforced concrete wall pier.

(2) Construction of basement exterior walls and reinforced concrete wall piles: when the basement outer wall is constructed, the reinforced concrete wall pier is constructed synchronously, the first longitudinal steel bar extension height of the reinforced concrete wall pier is the same as that of the basement outer wall, and the strength grade and the mix proportion of the reinforced concrete are the same as those of the basement outer wall.

(3) Construction of a waterproof layer and a waterproof protective layer: and after the concrete of the basement outer wall and the reinforced concrete wall pier reaches a certain strength, removing the templates of the basement outer wall and the reinforced concrete wall pier, performing base layer treatment, and constructing a waterproof layer and a waterproof protective layer.

(4) And (3) construction of the retaining wall: and a retaining wall is arranged on the retaining pile in an extending manner in the direction close to the outer wall of the basement, and the retaining wall is in contact with the buttress surface of the reinforced concrete wall.

(5) Backfilling earthwork: and backfilling earthwork after the construction of the underground retaining wall is completed and stabilized.

According to the invention, the reinforced concrete wall buttress is reserved on the basement outer wall main body structure as the support of the retaining wall, so that the problems of damage to water resistance and leakage hidden danger caused by bar planting on the basement outer wall main body structure are avoided, meanwhile, when the outer wall is constructed, the reinforced concrete wall buttress is constructed together, no retaining wall support is required to be additionally arranged, the potential safety hazard is reduced, the construction period is shortened, and meanwhile, after the construction of the retaining wall is finished, no external support is required to be added, so that the construction is more convenient.

Preferably, the retaining wall is a reinforced concrete structure, and the construction method is as follows: pre-burying a second longitudinal steel bar serving as the retaining wall at the retaining wall position in the step (1) in advance before the retaining wall construction in the step (4), then performing the basement outer wall and reinforced concrete wall stack construction in the step (2) and the waterproof layer and waterproof protective layer construction in the step (3), and then performing the retaining wall construction in the step (4), wherein the construction method comprises the following steps:

A. and (3) planting ribs on the retaining wall piles: carrying out horizontal steel bar planting on the corresponding retaining wall pile according to the position of the reinforced concrete wall pile;

B. binding steel bars: binding the steel bars in place according to the horizontal steel bars embedded with the steel bars on the retaining wall pile and the second longitudinal steel bars embedded in the retaining wall to form a retaining wall steel bar structure;

C. installing a template: and D, finishing the binding of the retaining wall reinforcing steel bar structure in the step B, and installing and fixing the retaining wall template after the detection is qualified.

D. Pouring concrete: after the retaining wall template is installed and detected to be qualified, concrete pouring is carried out on the reinforced structure of the retaining wall after binding to form the retaining wall, and the retaining wall after pouring is in contact with the stacking surface of the reinforced concrete wall.

(5) Backfilling earthwork: and backfilling earthwork after the concrete of the retaining wall reaches 100 percent of strength.

Adopt above-mentioned preferred scheme, retaining wall adopts reinforced concrete structure, and the structure is firm, prevents that the retaining wall from collapsing, takes place the incident, and in addition, reinforced concrete structure construction convenience, and construction material and basement outer wall material are unanimous, consequently, can reduce the material and use the kind, practice thrift the cost. In the construction process of the retaining wall, longitudinal steel bars are embedded in the foundation slab, steel bars are planted on the retaining wall piles and reserved wall piles are used as supports, the foundation needs not to be constructed and enlarged, the retaining wall is convenient to construct, the quality is guaranteed, the second longitudinal steel bars are embedded in the foundation slab during construction, the integrity of the retaining wall is enhanced, and meanwhile, the reinforced concrete structure is used as the retaining wall, so that the construction process intermittence time of building the constructional columns and the belt in the brick wall building construction can be avoided, and the construction period is shortened.

Preferably, in the step (5), the earthwork is backfilled in a layered backfilling and layered tamping mode.

By adopting the preferred scheme, the earthwork is backfilled by adopting a layered backfilling and layered tamping mode, so that the phenomenon of uneven settlement in the later period can be avoided.

Drawings

FIG. 1 is a schematic view of a reinforced concrete wall pier additionally arranged at a post-cast strip of an outer wall of a basement;

FIG. 2 is a schematic view of the construction of a waterproof and protective layer for the outer wall of a basement;

FIG. 3 is a plan view of a basement exterior wall post-cast strip retaining wall;

FIG. 4 is a plan view of the earth backfill between the outer wall of the basement and the retaining wall.

In the figure, 1-basement exterior wall, 2-reinforced concrete wall pile, 3-retaining wall pile, 4-retaining wall, 5-waterproof layer, 6-waterproof protective layer, 7-backfill soil, 8-first longitudinal steel bar, 9-second longitudinal steel bar and 10-horizontal steel bar.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

The basement outer wall post-cast strip retaining wall construction method comprises the following steps:

(1) embedding reinforcing steel bars: and reinforcing steel bars of the basement outer wall 1 and first longitudinal reinforcing steel bars 8 of the reinforced concrete wall pier 2 are pre-embedded. According to the actual needs of the site, the first longitudinal steel bars 8 of the basement outer wall 1 and the reinforced concrete wall pier 2 are pre-embedded on the basement foundation bottom plate, as shown in figure 1.

(2) The construction of basement outer wall 1 and reinforced concrete wall pier 2: when the basement outer wall 1 is constructed, the reinforced concrete wall pier 2 is constructed synchronously, the first longitudinal reinforcing steel bars 8 of the reinforced concrete wall pier 2 are lengthened and are as high as the basement outer wall 1, and the strength grade and the mix proportion of the reinforced concrete are as same as the basement outer wall 1.

(3) Constructing a waterproof layer 5 and a waterproof protective layer 6: after the concrete of the basement outer wall 1 and the reinforced concrete wall pier 2 reaches a certain strength, the templates of the basement outer wall 1 and the reinforced concrete wall pier 2 are removed, base layer treatment is carried out, and a waterproof layer 5 and a waterproof protective layer 6 are constructed, as shown in fig. 2.

(4) And (3) construction of the retaining wall: and a retaining wall 4 is arranged on the retaining wall pile 3 in an extending way towards the direction approaching the basement outer wall 1, and the retaining wall 4 is in surface contact with the reinforced concrete wall pile 2, as shown in figures 3 and 4.

(5) Backfilling earthwork: and backfilling earthwork after the construction of the retaining wall is completed and stabilized.

As shown in fig. 1 and 2, steps (1) to (3) are the construction of the basement exterior wall 1 and the reinforced concrete wall pier 2, and it can be seen from steps (1) to (3) that the reinforced concrete wall pier 2 is constructed simultaneously when the basement exterior wall 1 is constructed, so that the reinforced concrete wall pier 2 and the basement exterior wall 1 are integrated, and therefore the reinforced concrete wall pier 2 is a part of the basement exterior wall 1 which is additionally provided for supporting the retaining wall 4, and therefore, when the waterproof layer 5 and the waterproof layer 6 are constructed on the outer side of the basement exterior wall 1 and the outer side of the reinforced concrete wall pier 2, the waterproof layer 5 and the waterproof layer 6 are integrated, and the middle part is uninterrupted, so as to prevent the waterproof layer 5 and the waterproof layer 6 from being damaged. The waterproof layer 5 is made of a material known to those skilled in the art, such as two-component polyurethane, and will not be described in detail herein. The material used for the waterproof layer 6 is well known to those skilled in the art, such as extruded polystyrene board material, and will not be described in detail herein. And (3) after the construction of the basement outer wall 1 and the reinforced concrete wall pier 5 is completed, performing the construction of the retaining wall 4 in the step (4), as shown in fig. 3 and fig. 4, wherein the reinforced concrete wall pier 2 corresponds to the retaining wall pile 3, the retaining wall pile 3 extends to the direction close to the basement outer wall 1 to form the retaining wall 4, and the retaining wall 4 is in surface contact with the reinforced concrete wall pier 2. The retaining structure at the post-cast strip of the basement outer wall 1 comprises a retaining wall 4 and a reinforced concrete wall pile 2, wherein the retaining wall 4 is arranged by extending the retaining wall pile 3 in the direction close to the basement outer wall 1, the reinforced concrete wall pile 2 is in contact with the retaining wall surface, the effect of blocking backfill soil 7 is achieved, and the concrete wall pile 2 and the retaining wall pile 3 are respectively used as supporting points to ensure that the side slope of the backfill soil 7 does not collapse. Wherein, reinforced concrete wall pillar 2 improves the security of retaining wall 4 in the work progress as the support of retaining wall 4, has replaced outside supporting member simultaneously, reduces construction period, practices thrift the cost. In addition, when pouring basement outer wall 1, reserve construction reinforced concrete wall pile 2 simultaneously on basement outer wall 1, treat to pour the construction and accomplish the back, carry out waterproof layer 5 and water proof layer 6 construction to the basement outer wall 1 outside and the reinforced concrete wall pile 2 outside again to make the waterproof layer 5 and the water proof layer 6 in the whole basement outer wall 1 outside as an organic whole, need not plant the muscle and destroy waterproof layer 5 and water proof layer 6 on basement outer wall 1, reduced the risk of seepage. When the construction of the retaining wall is completed and stabilized, the earthwork backfilling is carried out, and the retaining wall 4 is ensured to resist the lateral pressure of the backfilled soil 7.

Example 2

Based on the above embodiment 1, as shown in fig. 1, 2, 3 and 4, the retaining wall 4 is a reinforced concrete structure, and its construction method is as follows: before the construction of the retaining wall 4 in the step (4), pre-burying a second longitudinal steel bar 9 as the retaining wall at the position of the retaining wall 4 in the step (1), then performing the construction of the basement outer wall 1 and the reinforced concrete wall pier 2 in the step (2), the construction of the waterproof layer 5 and the waterproof protective layer 6 in the step (3), and then performing the construction of the retaining wall 4 in the step (4), wherein the construction comprises the following steps:

A. and (3) planting ribs on the retaining piles: planting horizontal steel bars 10 on the corresponding retaining piles 3 according to the positions of the reinforced concrete wall piles 2;

B. binding steel bars: binding the steel bars in place according to the horizontal steel bars 10 embedded with the steel bars on the retaining wall piles 3 and the second longitudinal steel bars 9 embedded at the position of the retaining wall 4 to form a retaining wall steel bar structure;

C. installing a template: and D, finishing the binding of the retaining wall reinforcing steel bar structure in the step B, and installing and fixing the retaining wall 4 template after the detection is qualified, so that the concrete pouring process is ensured not to deform.

D. Pouring concrete: after the retaining wall template is installed and detected to be qualified, concrete pouring is carried out on the reinforced structure of the retaining wall after binding to form the retaining wall 4, and the retaining wall 4 after pouring is in surface contact with the reinforced concrete wall pile 2. When the retaining wall 4 is poured, detection is carried out, concrete pouring is stopped immediately when the template deforms, and the concrete is poured after the template is reinforced qualified.

(5) Backfilling earthwork: and backfilling earthwork after the concrete of the retaining wall reaches 100 percent of strength.

In this embodiment, retaining wall 4 adopts reinforced concrete structure to and adopt this structure retaining wall 4's construction mode, and retaining wall 4 adopts reinforced concrete structure, and the structure is firm, prevents that the retaining wall from collapsing, takes place the incident, and in addition, reinforced concrete structure construction convenience, and construction material is unanimous with basement outer wall material, consequently, can reduce the material and use the kind, practices thrift the cost. And in the work progress of retaining wall 4, adopt pre-buried second longitudinal reinforcement 8 on the soleplate, the mode of planting the muscle and reserving reinforced concrete wall buttress 2 as supporting on the dado pile 3, need not the enlarged footing basis of construction, and adopt this mode construction retaining wall 4, the construction method is simple, the quality obtains guaranteeing, second longitudinal reinforcement 8 is pre-buried when the soleplate is under construction, obtain reinforcing to the wholeness of retaining wall 4, adopt reinforced concrete structure as retaining wall 4 simultaneously, can avoid the construction process intermittent type time of brick wall bricklaying construction constructional column and waistband, practice thrift the time limit for a project. When the concrete of the retaining wall 4 reaches 100% strength, earth backfilling is carried out later, and the retaining wall 4 can resist the lateral pressure of the backfilled soil 7. In this embodiment, other undescribed contents are the same as those in the above embodiment, and are not described again here.

Example 3

Based on the above embodiment 1 or 2, as shown in fig. 4, in the step (5), the earth is backfilled by adopting a layered backfilling and layered tamping mode. And after the concrete of the retaining wall 4 reaches the strength of 100%, earth backfilling is carried out, so that the retaining wall 4 can resist the lateral pressure of the backfilled soil 7. When the earthwork is backfilled, the earthwork must be backfilled layer by layer and tamped layer by layer, so that the later uneven settlement is avoided. In this embodiment, other undescribed contents are the same as those in the above embodiment, and are not described again here.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, it should be noted that any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (3)

1. The basement outer wall post-cast strip retaining wall construction method is characterized by comprising the following steps:

(1) embedding reinforcing steel bars: embedding reinforcing steel bars of the basement outer wall and first longitudinal reinforcing steel bars of a reinforced concrete wall pier, wherein the reinforced concrete wall pier is located on the side face, facing the retaining pile, of the basement outer wall and corresponds to the retaining pile;

(2) construction of basement exterior walls and reinforced concrete wall piles: when the basement outer wall is constructed, a reinforced concrete wall pier is constructed synchronously, the first longitudinal steel bar extension height of the reinforced concrete wall pier is the same as that of the basement outer wall, and the strength grade and the mix proportion of reinforced concrete are the same as those of the basement outer wall;

(3) construction of a waterproof layer and a waterproof protective layer: after the concrete of the basement outer wall and the reinforced concrete wall pier reaches a certain strength, removing the templates of the basement outer wall and the reinforced concrete wall pier, performing base layer treatment, and constructing a waterproof layer and a waterproof protective layer;

(4) and (3) construction of the retaining wall: a retaining wall extends in the direction close to the outer wall of the basement from the retaining pile, and the retaining wall is in contact with the buttress surface of the reinforced concrete wall;

(5) backfilling earthwork: and backfilling earthwork after the construction of the retaining wall is completed and stabilized.

2. The construction method of the retaining wall at the post-cast strip of the basement exterior wall according to claim 1, wherein the retaining wall is of a reinforced concrete structure and is constructed in the following way: pre-burying a second longitudinal steel bar serving as the retaining wall at the retaining wall position in the step (1) in advance before the retaining wall construction in the step (4), then performing the basement outer wall and reinforced concrete wall stack construction in the step (2) and the waterproof layer and waterproof protective layer construction in the step (3), and then performing the retaining wall construction in the step (4), wherein the construction method comprises the following steps:

A. and (3) planting ribs on the retaining wall piles: carrying out horizontal steel bar planting on the corresponding retaining wall pile according to the position of the reinforced concrete wall pile;

B. binding steel bars: binding the steel bars in place according to the horizontal steel bars embedded with the steel bars on the retaining wall pile and the second longitudinal steel bars embedded in the retaining wall to form a retaining wall steel bar structure;

C. installing a template: b, after the binding of the retaining wall reinforcing steel bar structure in the step B is finished, installing and fixing a retaining wall template after the retaining wall reinforcing steel bar structure is detected to be qualified;

D. pouring concrete: after the retaining wall template is installed and qualified through detection, performing concrete pouring on the bound retaining wall reinforcement structure to form a retaining wall, wherein the poured retaining wall is in contact with the stacking surface of the reinforced concrete wall;

(5) backfilling earthwork: and backfilling earthwork after the concrete of the retaining wall reaches 100 percent of strength.

3. The construction method for the retaining wall at the post-cast strip of the basement exterior wall according to claim 1 or 2, wherein in the step (5), earth is backfilled in a mode of layered backfilling and layered tamping.

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