CN105625468B - A kind of method of construction of multi-layer underground building - Google Patents

Abstract

The invention provides a method for constructing a multi-storey underground building. During construction, the outermost side of the surrounding soil is in direct contact with the side of the enclosure structure. The enclosure structure includes enclosure corner columns, enclosure center columns and enclosure structures. The protective plate includes the following steps: using a claw bucket or an underground diaphragm wall excavator to excavate a trench with a predetermined depth along the outermost interior of the soil around the underground structure, and statically press the corner column , the enclosure center column, and the enclosure panels are vertically pressed into the soil body to the design depth; the soil body in the enclosure structure is excavated, and the exposed surface of the enclosure structure is cleaned; And/or inject waterproof mortar into the gap between the enclosure center column and the enclosure plate; pour the outer wall, bottom plate, floor slab of the underground building into one with the enclosure structure to form an underground building The main structure of the object; the construction method of a multi-storey underground building of the present invention is more efficient and safe.

Description

A kind of construction method of multi-storey underground building

technical field

The invention relates to the technical field of underground construction, in particular to a method for constructing a multi-storey underground building.

Background technique

When constructing underground buildings, in the prior art, sheet piles, underground diaphragm walls, etc. are usually used to form retaining walls, and then a formwork is built in a small space between the retaining wall and concrete is poured in the completed formwork Forms the walls of underground structures.

In this traditional construction method, when excavating the foundation, it is necessary to dig out additional space to ensure the space required for building the formwork, and at the same time, it also causes an increase in the amount of excavated earthwork, especially in the construction of urban reconstruction. There is usually only a limited distance between the newly built underground buildings and the original buildings that need to be preserved, which requires the need to improve the effective utilization rate. In addition, the traditional construction method also has various problems such as the need to backfill the above-mentioned extra excavated space, the excavated soil needs to be piled up before backfilling, and the ground subsidence after backfilling is not uniform.

Chinese patent CN1155606A discloses a foundation pit retaining wall as a basement side wall and a construction method thereof. The side wall is composed of a foundation pit retaining wall, a filling waterproof layer and an inner wall. Retaining walls include cantilever piles, simply supported piles and more. The design idea is mainly to use the retaining wall as an integral part of the basement retaining wall, and turn the temporarily supported retaining wall into a permanent structure instead of reinforced concrete pouring piles. However, the defect of this patent is that the design of the retaining wall originally temporarily supported needs to be designed according to the permanent structure, which increases the cost of the supporting structure, and the retaining wall structure is not suitable as a permanent load-bearing structure. Such a change in use May bring unpredictable hidden dangers.

Chinese patent CN103669402A discloses a pile-wall structure integration structure in which the main basement outer wall is combined with the surrounding protection piles. In the narrow space formed between the basement outer wall and the surrounding protection piles, a protective structure is arranged along the side of the basement outer wall. , force-transmitting plate strips, etc., so that the enclosure piles and the basement exterior walls work together in permanent use. After considering the stiffness contribution of the enclosure piles, the thickness of the exterior walls of the underground structure can be reduced to save engineering investment. But this patent still can't extra excavation space in the construction process, and the defect of building formwork in limited narrow space.

In view of the defects of the above-mentioned traditional construction methods, it is necessary to further improve the construction methods of underground buildings to solve the above-mentioned problems.

Contents of the invention

1. Technical problems to be solved

The technical problem to be solved by the invention is: how to realize the construction of multi-storey underground buildings, and make the construction method of multi-storey underground buildings more efficient and safe.

2. Technical solution

In order to solve the above-mentioned technical problems, the present invention provides a kind of construction method of multi-storey underground building, and the construction method of multi-storey underground building is implemented by following device, and device comprises: enclosure corner column, enclosure center column and enclosure plate, The cross-sectional shape of the enclosure corner column is circular and the shape corresponding to the convex part is dug out; the cross-sectional shape of the enclosure center column is "I" shape; the end of the enclosure plate has a convex part, which is suitable for the side of the enclosure center column The concave part is joined, and it is joined with the joint of the enclosure corner column; the inside of the enclosure panel is provided with vertical and horizontal reinforcement layers, and at the peripheral end of the enclosure panel, there are embedded parts connected with the reinforcement layer; the enclosure angle column, The enclosure center column and enclosure panels are prefabricated components;

The construction method of multi-storey underground building comprises the steps:

(1) Use a claw bucket or an underground diaphragm wall excavator to excavate a groove with a predetermined depth along the outermost interior of the soil around the underground building. The predetermined depth is less than the design depth of the enclosure structure. The section width of the protective structure is equal to or slightly smaller than that of the enclosure structure;

(2) At the corner of the underground building, press the enclosure corner columns vertically into the soil body to the design depth by means of static pressure;

(3) Vertically press the enclosure center column into the soil body to the design depth by static pressure between the corners of the underground structure;

(4) Between the adjacent enclosure corner columns and/or enclosure center columns, the enclosure panels are pressed into the soil body to the design depth by static pressure;

(5) Excavate the soil in the enclosure structure, and clean up the exposed surface of the enclosure structure;

(6) Connect the embedded parts between the enclosure corner columns and/or enclosure center columns and enclosure panels, and inject waterproof mortar into the gap between enclosure corner columns and/or enclosure center columns and enclosure panels ;

(7) Chisel the exposed surface of the enclosure structure, use the surface of the enclosure structure as the pouring template for the outer wall of the underground building, then build the inner template of the outer wall of the underground building, and combine the outer wall of the underground building with the lowermost layer The bottom slab and the enclosure structure are poured as one, and then the exterior wall of the upper underground building, the floor slab and the enclosure structure are poured as one, repeatedly forming a multi-layer structure.

3. Beneficial effects

The beneficial effects of the present invention are:

1. Excavate a trench with a predetermined depth so that the extrusion effect of the enclosure structure statically pressed into the soil on the surrounding soil can be appropriately relieved;

2. The pillars of the enclosure structure and the enclosure panels are all prefabricated structures, which are more suitable for use as permanent structures than the temporary retaining walls used in traditional technologies;

3. Although the enclosure structure is a part of the permanent structure, the main structure of the underground building is still cast in one piece, and its overall strength is not affected by the enclosure structure. The enclosure structure is only used as the main structure of the underground building. External template use;

4. During the construction process, it avoids various problems such as extra excavation space and backfilling treatment, and also solves the defect that the formwork is difficult to build in a narrow space;

5. The construction method of a multi-storey underground building of the present invention is more efficient and safer.

Description of drawings

Fig. 1 is a partial construction plan view of the underground structure of the present invention.

Fig. 2 is a schematic cross-sectional view of the shielding plate used in the present invention.

Detailed ways

The present invention will be further described below in conjunction with specific examples, but the present invention is not limited to these specific implementations. Those skilled in the art will realize that the present invention covers all alternatives, modifications and equivalents as may be included within the scope of the claims.

As shown in Figure 1, the partial construction plan of underground building, the outermost side of the surrounding soil body 1 of the underground building to be built is represented as 2, for the sake of clarity, the outermost side 2 of surrounding soil body 1 is shown in the accompanying drawings Spaced a slight distance from the sides of the envelope. However, during construction, the outermost side 2 of the surrounding soil body 1 can be in direct contact with the side of the enclosure structure.

According to the design, the enclosure corner column 11 and the enclosure center column 12 are embedded along the outermost side of the surrounding soil 1 in the construction site. The enclosure corner column 11 and the enclosure center column 12 can be prefabricated in a factory, or poured and formed at the construction site. Preferably, the enclosure corner columns 11 and the enclosure center columns 12 are factory prefabricated parts. The enclosure corner column 11 and the enclosure center column 12 are preferably pressed into the soil body 1 to a design depth by means of static pressure.

Then, between adjacent enclosure corner columns 11 and enclosure center columns 12 or between adjacent enclosure center columns 12 , the enclosure panels 13 are pressed into the soil to a designed depth. As shown in the drawings, the end of the enclosure plate 13 has a convex portion 131 adapted to engage with the concave portion 121 on the side of the enclosure center pillar 12 or engage with the engaging portion 111 of the enclosure corner post 111 . Schematically as shown in the drawings, the cross section of the enclosure center column 12 is "I" shape, and the section of the enclosure corner column 11 is circular and the shape corresponding to the convex part 131 is cut out.

But optionally, the cross section of the enclosure center column can also be in other shapes, such as T-shaped, circular with a concave portion, etc., and the section of the enclosure corner column can also be in other shapes, such as a square with a concave portion.

For the convenience of prefabricated production, prefabricated piles of other standard shapes can also be used, but it is necessary to arrange embedded parts on the surface of the piles that can be connected with the enclosure plate 13 directions.

As shown in FIG. 2 , vertical and horizontal reinforcement layers can be arranged inside the enclosure plate 13 . At the peripheral end of the enclosure plate 13, embedded parts connected with the reinforcement layer are arranged. One of the preferred embedded parts is a steel plate with bolt holes. In this way, the enclosure plate 13 can be initially fixed with the enclosure corner column 11 and the enclosure center column 12 by bolts.

The casing panels 13 are preferably sized with a standard building modulus so as to fit in combination with the size of the subterranean structure.

The enclosure structure can be used directly as a formwork for the exterior wall of an underground building. A specific construction method is schematically described below, but the implementation of the present invention is not limited to this schematic description. Those skilled in the art can know the use of other Known demolition-free templates or post-casting methods are implemented. For example, after the waterproof mortar treatment is performed on the gaps between the enclosure structures, the exposed surface of the enclosure structure can be chiseled, and the surface of the enclosure structure can be used as the pouring formwork for the exterior walls of underground buildings, and then the exterior walls of underground buildings can be built. The inner formwork of the underground building is poured on the outer wall 10, the bottom plate and the floor slab of the underground building on the enclosure structure to form the main structure of the underground building.

The construction method of underground building of the present invention is illustrated below with different embodiments:

Example 1

A construction method for an underground structure, comprising the steps of:

Step 1: Excavate a groove with a predetermined depth along the outermost 2 inside of the soil body 1 around the underground building with a claw bucket or an underground diaphragm wall excavator. The design depth of the center pillar 12 and the width of the groove are equal to or slightly smaller than the section width of the enclosure structure;

Step 2: press the enclosure corner column 11 to the design depth by static pressure at the corner of the underground building;

Step 3: press the enclosure center column 12 to the design depth by static pressure between the corners of the underground structure;

Step 4: Between the adjacent enclosure corner columns 11 and/or enclosure center columns 12, the enclosure panels 13 are pressed into the design depth by static pressure;

Step 5: excavate the soil body 10 in the enclosure structure, and clean up the exposed surface of the enclosure structure;

Step 6: Connect the embedded parts (if there are embedded parts) between the enclosure corner column 11 and/or the enclosure center column 12 and the enclosure panel 13, and connect the enclosure angle column 11 and/or the enclosure center column 12 with the enclosure Waterproof mortar is injected into the gap between the guard plates 13;

Step 7: pouring the outer wall 10 of the underground building, the base plate, the floor slab and the enclosure structure into one body to form the main structure of the underground building.

Example 2

A construction method for a multi-storey underground building, comprising the steps of:

Step 1: Excavate a groove with a predetermined depth along the outermost 2 inside of the soil body 1 around the underground building with a claw bucket or an underground diaphragm wall excavator. The design depth of the center pillar 12 and the width of the groove are equal to or slightly smaller than the section width of the enclosure structure;

Step 2: press the enclosure corner column 11 to the design depth by static pressure at the corner of the underground building;

Step 3: press the enclosure center column 12 to the design depth by static pressure between the corners of the underground structure;

Step 4: Between the adjacent enclosure corner columns 11 and/or enclosure center columns 12, the enclosure panels 13 are pressed into the design depth by static pressure;

Step 5: excavate the soil body 10 in the enclosure structure, and clean up the exposed surface of the enclosure structure;

Step 6: Connect the embedded parts (if there are embedded parts) between the enclosure corner column 11 and/or the enclosure center column 12 and the enclosure panel 13, and connect the enclosure angle column 11 and/or the enclosure center column 12 with the enclosure Waterproof mortar is injected into the gap between the guard plates 13;

Step 7: pouring the exterior wall 10 of the underground building and the bottom floor and the enclosure structure into one, then pouring the exterior wall 10 of the underground building on the upper floor and the floor slab and the enclosure structure as one, repeating to form multiple layers as required layer structure.

The beneficial effects of the embodiments of the present invention are:

1. Excavating a trench with a predetermined depth allows the extrusion effect of the enclosure structure statically pressed into the soil on the surrounding soil to be properly relieved.

2. The pillars of the enclosure structure and the enclosure panels are all prefabricated structures, which are more suitable for use as permanent structures than the temporary retaining walls used in traditional technologies.

3. Although the enclosure structure is a part of the permanent structure, the main structure of the underground building is still cast in one piece, and its overall strength is not affected by the enclosure structure. The enclosure structure is only used as the main structure of the underground building. External formwork is used.

4 During the construction process, it avoids various problems such as extra excavation space and backfilling treatment, and also solves the defect that the formwork is difficult to build in a narrow space.

The above specific embodiments are only schematic descriptions of the content of the present invention, and do not represent limitations on the content of the present invention. Those skilled in the art can imagine that the specific structure of the present invention can have many variations, but the main technical features of the technical solutions adopted are the same or similar to those of the present invention, and should be covered within the protection scope of the present invention.

Claims (1)

1. a kind of method of construction of multi-layer underground building, it is characterised in that the method for construction of the multi-layer underground building leads to Cross following building enclosures to implement, the building enclosure includes：Go along with sb. to guard him corner post, go along with sb. to guard him center pillar and wall interior panel, the end of the wall interior panel Portion has convex portion, and the cross sectional shape for going along with sb. to guard him corner post is that circle cuts out shape corresponding with the convex portion；It is described to go along with sb. to guard him center pillar Cross sectional shape be I-shaped；The convex portion is suitable to engage with the recess for going along with sb. to guard him center pillar side, and is gone along with sb. to guard him with described The junction surface of corner post engages；The wall interior panel is internally provided with vertical and horizontal steel bar layer, in the peripheral end parts of the wall interior panel, It is provided with the built-in fitting being connected with steel bar layer；It is described go along with sb. to guard him corner post, the center pillar and the wall interior panel of going along with sb. to guard him is prefabricated components；

The method of construction of the multi-layer underground building comprises the following steps：

(1) with pawl bucket or diaphram wall excavator, the outermost inner excavation along the underground structure surrounding soil goes out The groove of desired depth, the desired depth are less than the projected depth of the building enclosure, and the width of the groove encloses with described The cross-sectional width of protection structure is suitable or is slightly less than the cross-sectional width of the building enclosure；

(2) corner post of going along with sb. to guard him is pressed into the soil body to the design deeply vertically in a manner of static pressure in the corner of underground structure Degree；

(3) center pillar of going along with sb. to guard him is pressed into the soil body to the design vertically in a manner of static pressure between the corner of underground structure Depth；

(4) corner post is gone along with sb. to guard him described in adjacent and/or the wall interior panel is pressed into soil between center pillar by described go along with sb. to guard him in a manner of static pressure In vivo to the projected depth；

(5) excavate the soil body in the building enclosure, clear up the surface that the building enclosure is exposed；

(6) by it is described go along with sb. to guard him corner post and/or it is described go along with sb. to guard him the built-in fitting between center pillar and the wall interior panel and connect, enclosed described Waterproof mortar is injected in corner protector post and/or the gap gone along with sb. to guard him between center pillar and the wall interior panel；

(7) by the exposing surface dabbing of the building enclosure, using the surface of the building enclosure as the hypogee beyond the region of objective existence The formwork for placing of wall, the inner side template of the underground structure exterior wall is then built, by the exterior wall and orlop of underground structure Bottom plate is poured with building enclosure and is integrated, and then pours the exterior wall of last layer underground structure and floor for one with building enclosure Body, it is repeatedly formed sandwich construction.