Building foundation reinforcing device and operation method

Abstract

The invention relates to the technical field of building construction, in particular to a building foundation reinforcing device which can pre-reinforce an ancient building in advance and prevent deformation of the building due to foundation settlement caused by construction, and comprises a steel raft structure which is formed by a double-layer crossed rigid structure net below a building foundation, specifically, when a tunnel is excavated beside the historic building, in order to ensure the structural stability of the historic building in the tunnel construction process, the historic building is reinforced through a steel raft foundation. The method specifically comprises the steps that directional drilling is conducted, 120 I-shaped steel is inserted, and M30 cement mortar is poured; the strength and the rigidity of the raft tray type foundation meet the requirements, and then the periphery of the raft tray type foundation is poured into a new cup-shaped foundation through concrete. When differential settlement in a certain interval is caused by construction, the steel raft supports the historic building to carry out overall settlement in an allowable range, and inclination deformation caused by the differential settlement of the historic building is greatly weakened.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a building foundation reinforcement device and an operation method. Background Art

[0002] During the construction of public works, such as building high-speed tunnels, mountain excavation is required. However, this will affect nearby ancient buildings, such as ancient buildings, temples, etc., and cause the buildings to deform due to foundation settlement, so the foundations of these buildings need to be reinforced in advance. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention is proposed.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a building foundation reinforcement device, which includes a steel raft structure, which is composed of a double-layer cross-arranged rigid structural mesh under the building foundation.

[0005] As a preferred solution of the building foundation reinforcement device of the present invention, the steel raft structure includes a transverse support hole opened below the building foundation, and a first support member is arranged inside the transverse support hole.

[0006] As a preferred solution of the building foundation reinforcement device of the present invention, a first filler is arranged between the transverse multiplication hole and the first support member, and the first filler fills the gap between the first support member and the transverse multiplication hole.

[0007] As a preferred solution of the building foundation reinforcement device of the present invention, a longitudinal support hole is arranged above the transverse support hole, the longitudinal support hole is opened below the building foundation, and a second support member is arranged inside the longitudinal support hole.

[0008] As a preferred solution of the building foundation reinforcement device of the present invention, a second filler is arranged between the longitudinal multiplication hole and the second support member, and the second filler fills the gap between the second support member and the longitudinal multiplication hole.

[0009] As a preferred solution of the building foundation reinforcement device of the present invention, the number of the transverse multiplication holes and the number of the longitudinal multiplication holes are both multiple.

[0010] As a preferred solution of the building foundation reinforcement device of the present invention, when looking down from above, the support column of the building falls on the intersection of the first support member and the second support member.

[0011] The present invention also discloses an operation method, which includes the above-mentioned building foundation reinforcement device, and further includes:

[0012] Drilling beneath buildings that require foundation reinforcement;

[0013] After each hole is drilled, a support member is pushed in, and the support member can be an I-beam;

[0014] Filling materials between the support and the drill hole, the filling material may be cement mortar;

[0015] Check the reinforcement effect.

[0016] As a preferred embodiment of the operation method of the present invention,

[0017] Drilling beneath buildings that require foundation reinforcement, including:

[0018] Dig a settlement pit along the edge of the original foundation outside the building to be reinforced to provide operating space for subsequent drilling operations;

[0019] Drill the horizontal multiplication holes first, and then drill the vertical multiplication holes after all the horizontal multiplication holes are filled;

[0020] After drilling and before installing the support, the hole needs to be swept with a core tube to clear the rock debris and smooth the hole.

[0021] As a preferred embodiment of the operation method of the present invention,

[0022] Filling materials between the support and the drill hole, the filler may be cement mortar, and also includes:

[0023] First, weld the grouting valve to the bottom of the I-beam, weld the exhaust pipe to the top of the I-beam, and then seal the orifice with cement mortar;

[0024] Use the return grouting method. When grouting starts to occur at the exhaust pipe, stop the grouting and seal the grouting pipe.

[0025] Beneficial effects of the invention: The device can form a raft-type tray foundation with required strength and rigidity under the original foundation of the building, and then cast a new cup-shaped foundation around it. When the mountain construction causes uneven settlement within a certain range, the steel raft supports the building to settle as a whole within the allowable range, greatly reducing the tilt deformation of the building caused by uneven settlement. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2 It is a schematic diagram of the top view structure in the present invention.

[0029] Figure 3 It is a side view and a partially enlarged schematic diagram in the present invention.

[0030] Figure 4 It is a schematic diagram of the structure of the transverse multiplication hole in the present invention.

[0031] Figure 5 It is a schematic diagram of the structure of the longitudinal multiplication hole in the present invention.

[0032] Figure 6 This is a test data diagram after the reinforcement device of the present invention is built. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0036] Example 1, reference Figures 1 to 5 , which is the first embodiment of the present invention, provides a building foundation reinforcement device, which can pre-reinforce ancient buildings in advance to prevent the building from being deformed due to foundation settlement caused by construction. It includes a building foundation reinforcement device, which includes a steel raft structure 100, which is composed of a double-layer cross-arranged rigid structural net under the building foundation.

[0037] Specifically, when excavating a tunnel next to the ancient building, in order to ensure the structural stability of the ancient building during the tunnel construction process, the ancient building was reinforced with a steel raft foundation, trying to play the role of a "tray". The steel raft support was closely connected with the original strip foundation of the ancient building. The specific method is to directional drill holes, insert 120 I-beams, and pour M30 cement mortar; form a raft tray foundation with required strength and rigidity, and then pour concrete around it to form a new cup-shaped foundation. When the tunnel construction causes uneven settlement within a certain range, the steel raft supports the ancient building to settle as a whole within the allowable range, greatly reducing the tilt deformation of the ancient building caused by uneven settlement.

[0038] Example 2, reference Figures 1 to 5 , which is the second embodiment of the present invention. Different from the previous embodiment, this embodiment provides a specific structural composition of a steel raft structure 100, which includes: the steel raft structure 100 includes a transverse hole 101 opened below the building foundation, such as Figure 4 As shown, preferably, the drilling diameter and the spacing between the drilling holes can be set according to the scale of the building when drilling. The direction of the vertical axis of the drilling rig must be accurately controlled to ensure that the hole direction of the hole mouth is correct. After each hole is drilled, a first support member 102 is provided inside the transverse multiplication hole 101. Preferably, the first support member 102 can be an I-beam, and an I12 I-beam is pushed in. During drilling, an inclinometer should be frequently used to measure the deflection of the steel pipe drilling. If the deflection exceeds the design requirement, it should be corrected in time. A first filler 103 is provided between the transverse multiplication hole 101 and the first support member 102. The first filler 103 fills the gap between the first support member 102 and the transverse multiplication hole 101. The first filler 103 can be made of cement mortar.

[0039] Furthermore, a longitudinal hole 104 is provided above the transverse hole 101. Figure 5 As shown, the longitudinal multiplication hole 104 is opened below the building foundation, a second support member 105 is arranged inside the longitudinal multiplication hole 104, a second filler 106 is arranged between the longitudinal multiplication hole 104 and the second support member 105, and the second filler 106 fills the gap between the second support member 105 and the longitudinal multiplication hole 104. The building to be protected is regarded as a rectangle, and the holes drilled along the long side are transverse multiplication holes 101, and the holes drilled along the short side are longitudinal multiplication holes 104. The transverse holes are drilled in the lower layer, and the longitudinal holes are drilled in the upper layer. The number of the transverse multiplication holes 101 and the number of the longitudinal multiplication holes 104 are both multiple, as shown in FIG. Figure 2As shown, looking down from the top, the supporting column of the building falls on the intersection of the first supporting member 102 and the second supporting member 105. The second supporting member can be an I-beam. If the I-beam is not long enough, it can be alleviated, but it should be noted that the joints of the two layers of I-beams should be staggered to prevent stress concentration. Therefore, the welding lengths of the two layers of I-beams can be different. The I-beams are pushed in manually with the help of a small excavator. When the hole wall collapses and cannot be pushed in, the hole should be cleaned again before installing the I-beam.

[0040] Specifically, a rotary drill is selected as the machine used for drilling construction. The drilling construction is carried out according to the designed position. The horizontal multiplication hole 101 is drilled from east to west first. After the drilling and grouting of the east-west direction holes are completed, the longitudinal multiplication hole 104 is drilled from south to north. The vertical axis direction of the drilling rig must be accurately controlled to ensure the correct hole direction of the hole mouth. After each hole is drilled, an I12 I-beam is pushed in. During drilling, an inclinometer should be used frequently to measure the deflection of the steel pipe drilling. If the deflection exceeds the design requirements, it should be corrected in time. When processing each layer of I-beam, the I-beam steel sections are numbered, and they are matched according to the processed I-beam sections and recorded for use. The I-beam is pushed in manually with a small excavator. When the hole wall collapses and cannot be pushed in, the hole should be cleaned again before installing the I-beam.

[0041] Example 3, reference Figures 1 to 6 , which is the third embodiment of the present invention. Different from the previous embodiment, this embodiment provides an operation method for installing the building foundation reinforcement device, which includes a building foundation reinforcement device of the above embodiment, and further includes:

[0042] Drilling beneath buildings that require foundation reinforcement;

[0043] After each hole is drilled, a support member is pushed in, and the support member can be an I-beam;

[0044] Filling materials between the support and the drill hole, the filling material may be cement mortar;

[0045] Check the reinforcement effect.

[0046] Further, drilling is performed under the building that needs foundation reinforcement, including:

[0047] Dig a settlement pit along the edge of the original foundation outside the building to be reinforced to provide operating space for subsequent drilling operations;

[0048] Drill the horizontal multiplication holes first, and then drill the vertical multiplication holes after all the horizontal multiplication holes are filled;

[0049] After drilling and before installing the support, the hole needs to be swept with a core tube to clear the rock debris and smooth the hole.

[0050] Further, a material is filled between the support member and the drill hole, and the filler may be cement mortar, and further includes:

[0051] First, weld the grouting valve to the bottom of the I-beam, weld the exhaust pipe to the top of the I-beam, and then seal the orifice with cement mortar;

[0052] Use the return grouting method. When grouting starts to occur at the exhaust pipe, stop the grouting and seal the grouting pipe.

[0053] Specifically, surveying and setting out are required before construction. The bottom elevation of the cap is calculated based on the measured ground elevation. The excavation line of the foundation pit is laid out based on the calculation results. A small excavator is used for excavation. The floating soil is cleaned manually. The excavated soil is piled up in the soil storage yard on the top of the tunnel, and then the hole is drilled. After the drilling is completed, the core tube is used to sweep the hole, the purpose is to remove the rock slag in the hole and smooth the hole. The length of the core tube should not be less than 3m, and the length is better. If it is difficult to lower the pipe, the hole is swept several times continuously, and high-pressure air is used to blow and wash until the hole is clean, so as to prepare for the installation of the I-beam, and then pour cement mortar. After the mortar is filled, it is necessary to fill the settlement pit with steel mesh and then concrete. After the construction is completed, the vibration, deformation and settlement of the building can be monitored to determine the impact of the vibration caused by tunnel excavation on the building, as well as the deformation and settlement scale of the building that may be caused.

[0054] After the above foundation reinforcement work was carried out on an ancient building, the high-rise building tilt wireless remote monitoring system was used to detect it and obtain monitoring data such as Figure 6 As shown;

[0055] From the analysis of monitoring data, we can see that

[0056] 1. The data is smooth and stable, without any obvious large fluctuations or anomalies, which indicates that the monitoring data is normal and reliable.

[0057] 2. It can be seen from the data in the figure that the monitoring data is within the normal fluctuation range.

[0058] The cumulative settlement during tunnel construction was 13.21 mm.

[0059] The tilt angle change data is within the range of 0.1°, and the tilt monitoring warning value is 2°.

[0060] In summary, the average rate of change is smooth and stable, with no abnormalities, so the structure is judged to be safe.

[0061] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0062] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0063] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A building foundation reinforcement device, characterized in that: include, A steel raft structure (100) is composed of a double-layer cross-arranged steel structure net below the building foundation.

2. The building foundation reinforcement device according to claim 1, characterized in that: The steel raft structure (100) comprises a transverse hole (101) opened below the building foundation, and a first support member (102) is arranged inside the transverse hole (101).

3. The building foundation reinforcement device according to claim 2, characterized in that: A first filler (103) is provided between the transverse multiplying hole (101) and the first supporting member (102), and the first filler (103) fills the gap between the first supporting member (102) and the transverse multiplying hole (101).

4. The building foundation reinforcement device according to claim 3, characterized in that: A longitudinal hole (104) is arranged above the transverse hole (101), the longitudinal hole (104) is opened below the building foundation, and a second support member (105) is arranged inside the longitudinal hole (104).

5. The building foundation reinforcement device according to claim 4, characterized in that: A second filler (106) is provided between the longitudinal hole (104) and the second support member (105), and the second filler (106) fills the gap between the second support member (105) and the longitudinal hole (104).

6. The building foundation reinforcement device according to claim 5, characterized in that: The number of the transverse multiplying holes (101) and the number of the longitudinal multiplying holes (104) are both multiple.

7. The building foundation reinforcement device according to claim 6, characterized in that: Looking down from above, the supporting column of the building falls on the intersection of the first supporting member (102) and the second supporting member (105).

8. A method of operation, characterized in that: A building foundation reinforcement device comprising any one of claims 1 to 7, further comprising: Drilling beneath buildings that require foundation reinforcement; After each hole is drilled, a support member is pushed in, and the support member can be an I-beam; Filling materials between the support and the drill hole, the filling material may be cement mortar; Check the reinforcement effect.

9. The operation method according to claim 8, characterized in that: Drilling beneath buildings that require foundation reinforcement, including: Dig a settlement pit along the edge of the original foundation outside the building to be reinforced to provide operating space for subsequent drilling operations; Drill the horizontal multiplication holes first, and then drill the vertical multiplication holes after all the horizontal multiplication holes are filled; After drilling and before installing the support, the hole needs to be swept with a core tube to clear the rock debris and smooth the hole.

10. The operation method according to claim 9, characterized in that: Filling materials between the support and the drill hole, the filler may be cement mortar, and also includes: First, weld the grouting valve to the bottom of the I-beam, weld the exhaust pipe to the top of the I-beam, and then seal the orifice with cement mortar; Use the return grouting method. When grouting starts to occur at the exhaust pipe, stop the grouting and seal the grouting pipe.

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