TWI753415B - Construction Method of Constructing Continuous Wall Guide Ditch of New Building on the Old Underground Floor Structure - Google Patents

Abstract

A construction method for constructing a continuous wall guide ditch for a new building on an old underground floor structure. The construction steps include: fitting the old underground floor plan with the new building plan, measuring and setting out on the spot, and creating a construction in the old underground floor. Space, make continuous wall guide ditch, connect old beams and columns as new and old co-construction structures, make buttress guide ditch and ground wall guide ditch, and complete the guide ditch for the continuous wall of the new building. Among them, the wall surface of the underground layer of the old building can be used as one side wall surface of the guide ditch, and only a vertical wall surface needs to be used as the other side guide ditch wall. Between the wall surface of the basement of the old building and the vertical wall surface, the guide channel of the new building is formed. In the position where the wall surface of the underground layer of the old building cannot be used as the wall of the guide ditch, the two side walls of the guide ditch must be used.

Description

Construction Method for Constructing Continuous Wall Guide Ditch of New Building on Old Underground Floor Structure

The invention relates to a construction method for constructing a continuous wall guide ditch for a new building on an old underground floor structure, and mainly solves the construction method for making a guide ditch before the continuous wall of a new building is constructed on the old underground floor structure. .

The geographical location of the island of Taiwan is on the overlapping of the Eurasian plate and the Philippine plate, and earthquakes are frequent. After the disaster of the 921 Nantou Earthquake, the construction law was revised to improve the structural safety factor, and the amount of steel bars was about 30% higher than that of the original building. In addition, the Construction Administration of the Ministry of the Interior also announced the dangerous information of geological weakness in various parts of Taiwan. Experts and scholars have also published estimates of how many houses with four or five floors built in dense urban areas based on the old building law will collapse if a magnitude 7-9 earthquake occurs. Therefore, the safety factor of such old buildings does not conform to the new building regulations, so governments at all levels should actively dismantle and update them to ensure the safety of people's lives and property.

In urban areas, many old buildings have been demolished and rebuilt, all of which have basements one to three floors, especially in the commercial egg yolk area with high housing prices. The government encourages underground excavation to add parking spaces, with volume rewards. Therefore, the basement of the new building is designed to be four to seven floors underground to strive for profit and business opportunities. However, due to the problem of house damage in the adjacent area and the structural safety problem of the old underground layer, it cannot be freely designed like the original, but must cooperate with and limit the original old structure to construct the new building safely. That is to say, the underground structure type of new buildings, compared with the underground structure type of old buildings, needs to be limited by the relationship between the old existing underground structure and the safety and public safety of adjacent buildings and needs to be mutually related to the environment. Coordination without too much variation.

The industry digs and builds basements in urban areas, and the "continuous wall construction method" is still the main method in the past and in the future. However, prior to the "Continuous Wall Construction Method", a "Continuous Wall Guidance Ditch" must be built first, as the construction work platform for the subsequent construction of the continuous wall body. In the past, the construction project of "continuous wall guide ditch" in the original plain land was simple and easy, and it was a low-tech supporting project. However, in the future reconstruction projects of old buildings with basements one to three floors, the construction of "continuous wall guide ditch" will become the protagonist in the construction of continuous wall due to the technical improvement of the construction project. In the meantime, the wall of the guide ditch has become the main role in the structure, and it needs to be joined and co-constructed with the old underground floor structure. In addition, the construction personnel and construction machinery are all constructed in the space of the underground layer of the structure combining the old and the new. At the same time, the plane layer on the top of the underground layer also needs to carry construction machinery in and out of hoisting, material in and out hoisting, grouting pressure feeder, ready-mix Cement trucks and other heavy loads have resulted in the "co-construction method of old and new guide ditch".

In order to solve the smooth construction of the continuous wall project of the old building being converted into a new building, a new and old construction method of the guide ditch is provided with the basement of the old building, so that it is not easy to cause damage to the adjacent houses during construction.

The construction method for constructing a continuous wall guide ditch of a new building on the old underground floor structure provided by the present invention, the construction steps include: fitting the old underground floor plan with the new building plan, measuring and setting out on the spot, setting out the old underground floor Create construction space, make continuous wall guide ditch, connect old beams and columns as a new and old co-construction structure, make buttress guide ditch and ground wall guide ditch, and complete the guide ditch of the continuous wall of the new building to provide follow-up construction For platforms with continuous walls.

The steps of overlapping the old underground floor plan with the new building plan are mainly to convert the electronic map file of the new building and the original hand-drawn drawing of the old underground floor into the electronic map file to overlap the map, so as to Completion of the preliminary planning for the construction of the new guide ditch.

The steps of on-site measurement and staking are to confirm and correct the errors of the old and new measuring instruments before and after the land re-measurement. In addition to the on-site measurement of the old buildings, the guide ditch also needs to be fully staked out on the spot before the results can be provided to confirm the production of the guide ditch. Whether the plan needs to be modified to match the new building floor plan.

The steps to create a construction space in the old basement, knock out the construction access on the roof of the basement of the old building. Hang the operating machinery and materials in the old underground layer from the opening of the construction channel.

In the step of making the continuous wall guide ditch, the wall surface of the basement of the old building is used as one side wall of the guide ditch; a vertical wall surface is used as the other side of the guide ditch wall to form the guide ditch of the new building. In the position where the wall surface of the underground layer of the old building cannot be used as the guide ditch wall, the guide ditch walls on both sides of the guide ditch shall be applied.

The steps of connecting the old beams and columns as the old and new co-construction structures are mainly at the guide ditch position of the old beams and columns. The wall of the guide channel is integrated into a whole, so that the old beam and column can produce a new and old common structure, and has the function of a structural buttress.

The steps of making the buttress guide ditch and the mid-ground wall guide ditch are mainly when the distance between the guide ditch walls is too long, and a short-wall buttress guide ditch needs to be constructed in the middle position.

In the step of making the continuous wall guide ditch, when the guide ditch of the new building is located in the peripheral area of the wall surface of the basement of the old building, the guide ditch is made by direct excavation. In addition, when the guide ditch of the new building is to penetrate the wall surface of the underground layer of the old building, the pierced position is cut by crushing and milling, so that the guide ditch is continuous.

10: Old buildings

11: Wall

111: The location of the penetration

112: The location of the penetration

12: Construction access

13: Old Beams and Columns

14: Vertical pillar

20: Guide ditch

21: Guide trench wall

22: Guide trench wall

23: Guide trench wall

30: Buttress guide ditch

31: Underground wall guide ditch

40: Support block

50: Pond pit

60: Support column

Step a: Fit the old underground floor plan with the new building plan

Step b: On-site measurement and stakeout

Step c: Create construction space in the old basement

Step d: Fabrication of continuous wall channel

Step e: Connect the old beams and columns as the old and new co-construction structure

Step f: make buttress guide ditch and ground wall guide ditch

Figure a construction flow chart of the invention.

FIG. 2 is a top view of an embodiment of the present invention.

Figure 3 is a state diagram of connecting the old beams and columns as a common structure of the old and new guide channels.

The construction method for constructing a continuous wall guide ditch of a new building on the old underground floor structure disclosed by the present invention mainly uses the underground wall of the old building as a part of the guide ditch wall of the continuous wall guide ditch, so that the new building can be used as a guide ditch. The construction of the continuous wall of the building will not cause damage to the adjacent houses. Generally, the excavation depth of the continuous wall guide trench of the original plain building is about 1.5m. The depth of the underground layer of the old buildings is more than 3.0m, so the construction of the guide ditch wall of the continuous wall of the new building is completely different from the traditional guide ditch construction.

See Figure 1. The construction method of constructing the continuous wall guide ditch of the new building on the old underground floor structure disclosed by the present invention, the construction steps are:

a. The old underground floor plan is overlapped with the new building plan:

Convert the old hand-drawn scale paper and the local lower layer into an electronic drawing file. The electronic map file of the new building is overlapped with the electronic map file of the old underground layer to initially plan the new guide ditch, which is also used as a preliminary plan for the feasibility of the new building.

b. On-site measurement and stakeout:

The old building 10 is measured on-site to verify the error between the drawing of the old license and the on-site measurement, and the plan design drawing of the new building is revised according to the error. Stake out 20 positions of the new guide trenches on site. Among them, the wall surface 11 of the basement of the old building 10 can be used as a side wall surface of the guide trench 20 .

c. Create construction space in the old basement:

The construction access opening 12 is knocked out on the roof of the basement of the old building, so that the working machinery, tools and materials can be removed. It is suspended in the old underground layer through the construction channel opening 12 . The underground layer becomes the working space platform where the guide trench 20 is constructed.

d. Making continuous wall guide trenches:

The wall surface 11 of the basement of the old building 10 can be used as one side wall surface of the guide trench 20 . A vertical wall surface is used as the other side channel wall 21 . Between the wall surface 11 of the basement of the old building 10 and the vertical wall surface, the guide channel 20 of the new building is formed. In the position where the wall surface of the underground layer of the old building cannot be used as the guide ditch wall, the guide ditch walls 22 and 23 on both sides of the guide ditch 20 must be applied.

e. Connect the old beams and columns as the old and new co-construction structure:

At the position of the guide ditch 20 with the old beam and column 13, the old beam and column 13 must be cut off, and a vertical column 14 must be constructed at the cut-off place. The vertical column 14 is integrated with the guide channel wall 21 to improve the old beam 13 structural force, and has the function of buttress.

f. Making peripheral buttress guide ditch 30 and ground wall guide ditch 31;

In the area where the span of the guide ditch wall 21 is too large, the peripheral buttress guide ditch 30 is added in the middle position; In the production project of continuous wall, the production of buttresses and mid-ground wall is mainly to increase the overall structural force of the continuous wall.

In step d, when the guide ditch 20 of the new building is located in the peripheral area of the wall surface of the underground layer of the old building 10, the guide ditch 20 is produced by direct excavation. Moreover, when the guide ditch 20 of the new building is to penetrate the wall surface 11 of the basement of the old building, the pierced positions 111 and 112 are cut by crushing and milling, so that the guide ditch 20 is continuous.

In step e, after cutting off the old beam and column 13 , a laterally extending support block 40 is arranged between the old wall surface 11 and the new channel wall 21 . The support block 40 is made of unreinforced concrete. The support block 40 is directly excavated when excavating the continuous wall.

When constructing the continuous wall body, there must be an earth pit to store the excavated earthwork, and there must also be a pool pit 50 to store the stabilizing fluid. After excavating the earth, it is necessary to fill the stabilizer liquid to keep the liquid surface pressure wall from collapsing. Before excavating the earthwork, the beams, columns and floor slabs of the basement of the old building can be used for reconstruction to make the required continuous wall pool pit 50 .

When constructing the continuous wall body, pavement is required to provide heavy machinery, ready-mixed concrete trucks, waste soil trucks, and steel bar trucks. At present, the general construction procedure, after the completion of the surrounding guide ditch wall, it is necessary to continue to remove the old floor slab, and then transport backfill from other places to fill the entire space of the old structure. The grooves are connected. For this practice, wait at least 14 days for the maintenance period. After the concrete is solidified, the construction of the continuous wall body can be carried out. After the continuous wall body is completed, when excavating, all the backfill should be excavated to make another supporting structure, and the underground excavation will be gradually carried out.

The construction method of the guide ditch provided by the present invention can retain the beams and columns of the basement of the old building, and can directly add new pavement on the old floor without removing all the floors, which can save the "cost" of making the pavement, and the old The floor slab also exerts the residual value, which can save the "construction period" of the concrete to maintain the strength. Meanwhile, in order to ensure sufficient bearing capacity of the new pavement directly overlaid on the old floor slab, support columns 60 can be added to the basement of the old building. The support column 60 may be an RC cement column or a steel column.

The construction method for constructing a continuous wall guide ditch of a new building on the old underground floor structure provided by the invention makes full use of the structure of the old building's underground layer to produce a new and old co-constructed guide ditch structure. In addition, the construction of the subsequent continuous wall body has a high degree of safety, and it is not easy to cause damage to the adjacent house. In addition, the present invention uses the existing underground floor wall surface as one side guide ditch wall of the guide ditch, which can reduce the construction cost of constructing a new building continuous wall guide ditch on the existing underground floor structure.

The above is an embodiment of the present invention disclosed above, but it is not intended to limit the present invention, any person familiar with the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be determined by the scope of the patent application.

Step a: Fit the old underground floor plan with the new building plan

Step b: On-site measurement and stakeout

Step c: Create construction space in the old basement

Step d: Fabrication of continuous wall channel

Step e: Connect the old beams and columns as the old and new co-construction structure

Step f: make buttress guide ditch and ground wall guide ditch

Claims (3)

A construction method for constructing a continuous wall guide ditch for a new building on an old underground floor structure, the construction steps are: a. The old underground floor plan and the new building plan are fitted: the old hand-painted scale paper is localized to the lower floor plan. Convert the drawing into an electronic map file; superimpose the electronic map file of the new building with the electronic map file of the old underground layer to preliminarily plan the new guide channel; b. On-site measurement and staking: the old building is measured on-site to verify the validity of the old license. If there is an error between the drawing and the on-site measurement, the planning and design drawing of the new building shall be revised according to the error; the location of the new guide ditch shall be set out on the spot; wherein, the wall surface of the basement of the old building can be used as the outer wall surface of the guide ditch wall; c. The old basement creates construction space: knock out the construction access opening on the basement roof of the old building; hoist the operating machinery and materials from the construction access opening into the old basement; the basement becomes the guide ditch d. Making a continuous wall guide ditch: the wall of the basement of the old building can be used as one side wall of the guide ditch; a vertical wall can be used as the other side of the guide ditch; the old building The guide ditch of the new building is formed between the wall of the underground layer and the vertical wall; where the wall of the underground layer of the old building cannot be used as the wall of the guide ditch, the guide ditch walls on both sides of the guide ditch must be used. ; e. Connect the old beams and columns as the old and new co-construction structure: at the guide ditch position where the old beams and columns are located, the old beams and columns must be cut off, and a vertical pillar should be constructed at the cut-off place. Combined into one, the old beam and column can be formed into a new and old common structure, and it has the function of buttress; The supporting block is made of unreinforced concrete; f. Make buttress guide ditch and ground wall guide ditch; in the area where the wall span of the guide ditch is too large, the surrounding buttress guide ditch is added in the middle position ; In addition, make the guide ditch in the ground wall, and complete the production of the guide ditch. According to the construction method of constructing a continuous wall guide ditch of a new building on the old underground floor structure as described in item 1 of the scope of the application, in step d, the guide ditch of the new building is located in the peripheral area of the wall surface of the basement of the old building When digging directly, make a guide trench. According to the construction method of constructing a continuous wall guide ditch of a new building on the old underground floor structure as described in item 2 of the scope of application, wherein, in step d, when the guide ditch of the new building is to penetrate the wall surface of the underground floor of the old building , at the penetrating position, it is milled by crushing, so that the guide groove is continuous.

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