CN113550318A - Construction method of prefabricated caisson mold capable of replacing brick mold with mucky soil - Google Patents

Abstract

The invention discloses a construction method of a prefabricated caisson mold capable of replacing a brick forming die with mucky soil, and relates to the technical field of buildings. The construction method of the prefabricated caisson mold capable of replacing the brick molding bed by the mucky soil comprises the following specific operations: and S1, judging the current geological condition, and if the mucky soil has poor cohesive force and is easy to collapse to cause great potential safety hazard, performing S2. The prefabricated caisson mold construction method for replacing the brick molding bed by the mucky soil can be used for immediately hoisting the mold in place after a foundation pit is excavated by prefabricating the caisson type steel mold in advance, so that the risk of side slope collapse is prevented, the safety of excavation of the elevator shaft and the sump pit earthwork is ensured, the engineering cost is reduced, the later maintenance cost is eliminated, the prefabricated caisson mold can replace the brick molding bed, can play a role of a retaining wall, prevents earthwork collapse, is integrated with the bed course, has good waterproof performance and good integrity, and can prevent the bed course of a soft foundation from sinking and cracking due to uneven settlement.

Description

Construction method of prefabricated caisson mold capable of replacing brick mold with mucky soil

Technical Field

The invention relates to the technical field of buildings, in particular to a construction method of a prefabricated caisson mold, wherein mucky soil can replace a brick forming die.

Background

At present, along with the development of economy, the city scale is bigger and bigger, and resident's residence is more and more concentrated, and high-rise building is increasing day by day, in the relatively poor area of soil property, for satisfying high-rise building's foundation bearing capacity requirement, adopts piled raft foundation form usually, but the elevation of sump pit and elevartor shaft is higher relatively, does not reach the holding power layer, and plus southern rainwater and river are more, mostly mucky soil under the general condition, cause very big degree of difficulty to the construction of elevartor shaft and sump pit.

In the actual process of excavating mucky soil earthwork, after the excavation of an elevator shaft and a collector well is finished, when a cushion layer and a masonry brick moulding bed are not reached, collapse is easy to occur, great potential safety hazards are caused, the construction difficulty is high, generally, supporting piles need to be driven for the elevator shaft and the collector well, but the construction period is too long, the cost is too high, and the construction difficulty is too large.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a construction method of a prefabricated caisson mold, which can replace a brick forming die by mucky soil, and solves the problems that in the actual construction of excavation of mucky soil earthwork, after the excavation of an elevator shaft and a collector well is finished, a sealing cushion layer and a brick forming die are not reached, collapse easily occurs, great potential safety hazards are caused, the construction difficulty is high, support piles need to be driven to the elevator shaft and the collector well, the construction period is too long, the cost is too high, and the construction difficulty is too large.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a construction method of a prefabricated caisson mold capable of replacing a brick bed mould with mucky soil comprises the following specific operations:

s1, judging the current geological condition, if the cohesive force of the mucky soil is poor and the mucky soil is easy to collapse to cause great potential safety hazard, performing S2, otherwise, performing normal brick moulding bed construction operation;

s2, calculating the sizes of the elevator well and the water collecting well in advance according to construction drawings;

s3, adopting steel plates, welding a caisson mould with specified size by taking a steel plate with the thickness of 4mm and stiffening ribs as materials according to the requirements of a drawing, ensuring that the caisson mould has good waterproof performance, flanging the top of the mould towards the periphery, and anchoring the caisson mould into a raft foundation cushion layer to form a whole with the cushion layer;

s4, after the earthwork excavation is finished, the mold is immediately hoisted to the designated position by a tower crane or a crane, so that the brick mould can be replaced, the function of protecting the wall can be played, and the earthwork collapse is prevented.

(III) advantageous effects

The invention provides a construction method of a prefabricated caisson mold, which can replace a brick molding bed by mucky soil. The method has the following beneficial effects: the prefabricated caisson mold construction method for replacing the brick molding bed by the mucky soil can be used for immediately hoisting the mold in place after a foundation pit is excavated by prefabricating the caisson type steel mold in advance, so that the risk of side slope collapse is prevented, the safety of excavation of the elevator shaft and the sump pit earthwork is ensured, the engineering cost is reduced, the later maintenance cost is eliminated, the prefabricated caisson mold can replace the brick molding bed, can play a role of a retaining wall, prevents earthwork collapse, is integrated with the bed course, has good waterproof performance and good integrity, and can prevent the bed course of a soft foundation from sinking and cracking due to uneven settlement.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

In the figure: 1. 4mm thick steel plate; 2. a stiffening rib.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: a construction method of a prefabricated caisson mold capable of replacing a brick bed mould with mucky soil comprises the following specific operations:

s1, judging the current geological condition, if the cohesive force of the mucky soil is poor and the mucky soil is easy to collapse to cause great potential safety hazard, performing S2, otherwise, performing normal brick moulding bed construction operation;

s2, calculating the sizes of the elevator well and the water collecting well in advance according to construction drawings;

s3, adopting steel plates, welding a caisson mould with specified size by taking a steel plate with the thickness of 4mm and stiffening ribs as materials according to the requirements of a drawing, ensuring that the caisson mould has good waterproof performance, flanging the top of the mould towards the periphery, and anchoring the caisson mould into a raft foundation cushion layer to form a whole with the cushion layer;

s4, after the earthwork excavation is finished, the mold is immediately hoisted to the designated position by a tower crane or a crane, so that the brick mould can be replaced, the function of protecting the wall can be played, and the earthwork collapse is prevented.

In the poor area of geological conditions, the civil buildings who have the basement generally adopt piled raft foundation, but the elevation of sump pit and elevartor shaft is higher relatively, does not reach the holding power layer, and plus southern rainwater and river are more, are mostly mucky soil under the general condition, cause very big degree of difficulty to the construction of elevartor shaft and sump pit.

The cohesive force of the mucky soil is poor, and after the excavation of an elevator shaft and a collector well is finished, a sealing cushion layer and a masonry brick moulding bed are not available, so that the mucky soil is easy to collapse. Causing great potential safety hazard and increasing the construction difficulty.

To this problem, this patent develops a caisson type steel mould prefabricated with steel sheet specially, and the excavation of elevator shaft and collector well is accomplished the back and is hung this caisson type basis to appointed position immediately, can replace the brick bed-jig, can play the effect of dado again, prevents that the earthwork from collapsing.

The caisson type steel mould has good waterproof performance, the top of the mould is turned over towards the periphery, and the mould can be anchored into a raft foundation cushion layer to form a whole with the cushion layer, so that the caisson type steel mould has good waterproof performance.

The caisson type steel mould has good integrity and can prevent the soft foundation cushion layer from sinking and cracking due to uneven settlement.

In conclusion, the construction method of the prefabricated caisson mold capable of replacing the brick moulding bed by the mucky soil has the advantages that the caisson mold can be immediately hoisted in place after the foundation pit is excavated by prefabricating the caisson type steel mold in advance, the risk of slope collapse is prevented, the safety of earth excavation of an elevator shaft and a water collecting well is ensured, the engineering cost is reduced, the later maintenance cost is eliminated, the brick moulding bed can be replaced, the wall protecting effect can be realized, the earth collapse is prevented, the prefabricated caisson mold and the cushion layer form a whole, the waterproof performance is good, the integrity is good, and the sinking and cracking of the soft foundation cushion layer due to uneven settlement can be prevented.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (1)

1. A construction method of a prefabricated caisson die capable of replacing a brick forming die with mucky soil is characterized by comprising the following steps of: the specific operation is as follows:

s1, judging the current geological condition, if the cohesive force of the mucky soil is poor and the mucky soil is easy to collapse to cause great potential safety hazard, performing S2, otherwise, performing normal brick moulding bed construction operation;

s2, calculating the sizes of the elevator well and the water collecting well in advance according to construction drawings;

s3, adopting steel plates, welding a caisson mould with specified size by taking a steel plate with the thickness of 4mm and stiffening ribs as materials according to the requirements of a drawing, ensuring that the caisson mould has good waterproof performance, flanging the top of the mould towards the periphery, and anchoring the caisson mould into a raft foundation cushion layer to form a whole with the cushion layer;

s4, after the earthwork excavation is finished, the mold is immediately hoisted to the designated position by a tower crane or a crane, so that the brick mould can be replaced, the function of protecting the wall can be played, and the earthwork collapse is prevented.

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