Vertical sectional type underground diaphragm wall deformation monitoring structure and underground diaphragm wall body with vertical sectional type underground diaphragm wall deformation monitoring structure

Abstract

The utility model provides a vertical sectional type underground diaphragm wall deformation monitoring structure which comprises a plurality of reinforcement cages, the reinforcement cages are sequentially connected from bottom to top, at least one of every two adjacent reinforcement cages is provided with lap joint section steel bars, and every two adjacent reinforcement cages are welded through the lap joint section steel bars. The monitoring optical fibers are arranged on each reinforcement cage, the monitoring optical fibers extend along vertical steel bars of the reinforcement cages and are fixed, the monitoring optical fibers are symmetrically arranged on the two faces of each reinforcement cage in the thickness direction, the monitoring optical fibers on the reinforcement cage at the bottom are in a U shape, and the monitoring optical fibers on at least one of every two adjacent reinforcement cages are provided with reserved optical fibers; and the reserved optical fibers are used for welding the monitoring optical fibers on the two adjacent welded reinforcement cages through the reserved optical fibers. The problem that the optical fibers of the segmented underground diaphragm wall are difficult to arrange is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to underground continuous wall body technical field, especially in a vertical segmented underground continuous wall deformation monitoring structure and have its underground continuous wall body. BACKGROUND

[0002] Underground continuous wall is usually composed of reinforced concrete, forms a vertical or inclined underground wall through continuous construction, and the underground continuous wall has been recognized as one of the best retaining structures in deep foundation pit engineering. It has the functions of foundation pit support and underground main structure, plays a retaining and anti-seepage role during construction, and can also play a bearing advantage after completion, effectively reducing the risk of ground building settlement. The height of underground continuous wall is usually dozens of meters, and it is difficult to hoist the whole steel reinforcement cage under the conditions of small construction site or high-voltage line above the construction site, so it is necessary to be vertically segmented and placed section by section, which brings many inconveniences to the monitoring technology. SUMMARY

[0003] The utility model embodiment provides a kind of vertical segmented underground continuous wall deformation monitoring structure and the underground continuous wall body with it, to at least solve the above part technical problems existing in prior art.

[0004] In the first aspect, the utility model embodiment provides a kind of vertical segmented underground continuous wall deformation monitoring structure, comprising:

[0005] A plurality of steel reinforcement cages, a plurality of steel reinforcement cages are sequentially connected from bottom to top, at least one of adjacent two steel reinforcement cages has lap joint section steel reinforcement, and adjacent two steel reinforcement cages are welded by lap joint section steel reinforcement;

[0006] Monitoring optical fiber is arranged on each steel reinforcement cage, and monitoring optical fiber extends and is fixed along the vertical steel reinforcement of steel reinforcement cage;Monitoring optical fiber is symmetrically arranged on two sides in the thickness direction of each steel reinforcement cage, and monitoring optical fiber on the steel reinforcement cage at the bottom is in U shape;Monitoring optical fiber on at least one of adjacent two steel reinforcement cages has reserved optical fiber, and monitoring optical fiber on adjacent two steel reinforcement cages after welding is fused through reserved optical fiber.

[0007] In optional embodiment, monitoring optical fiber is fixed with vertical steel reinforcement by binding.

[0008] In optional embodiment, monitoring optical fiber is fixed with vertical steel reinforcement by cross binding.

[0009] In optional embodiment, U-shaped protective tube is arranged on the steel reinforcement cage at the bottom, and monitoring optical fiber passes through U-shaped protective tube.

[0010] In an optional embodiment, the U-shaped protection tube is a PU (polyurethane) tube.

[0011] In an optional embodiment, among the plurality of steel reinforcement cages, at least the top steel reinforcement cage is provided with a first protection tube, the first protection tube is arranged at the upper portion of the top steel reinforcement cage, extends along the vertical steel reinforcement and is fixed, the monitoring optical fiber passes through the first protection tube, the upper end of the first protection tube is connected with a second protection tube, the first protection tube and the second protection tube are in communication, the reserved optical fiber on the top steel reinforcement cage is accommodated in the second protection tube, and the pipe opening of the second protection tube is sealed with an end cap.

[0012] In an optional embodiment, the first protection tube is a metal tube, and the first protection tube is welded on the vertical steel reinforcement; and the second protection tube is a PVC tube.

[0013] In an optional embodiment, the pipe diameter of the second protection tube is greater than that of the first protection tube, and the second protection tube and the first protection tube are connected through a reducing joint.

[0014] In an optional embodiment, the second protection tube is arranged perpendicularly to the first protection tube.

[0015] In a second aspect, the utility model provides a kind of underground continuous wall, including the vertical sectional underground continuous wall deformation monitoring structure described in the utility model embodiment.

[0016] One embodiment of the utility model has the following advantages or beneficial effects:

[0017] In the vertical sectional underground continuous wall deformation monitoring structure of the utility model embodiment, a plurality of steel reinforcement cages can be respectively hoisted to the target position in sequence, and are welded as a whole by lap joint segment steel reinforcement. Monitoring optical fiber is arranged on each steel reinforcement cage, and after welding the steel reinforcement cage, the monitoring optical fiber is fused by the reserved optical fiber. The problem of difficult fiber laying of sectional underground continuous wall is solved, and the deformation of sectional continuous wall can be monitored. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and other features and advantages of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

[0019] Figure 1 is the front structure schematic diagram of the top steel reinforcement cage according to an exemplary embodiment;

[0020] Figure 2 is the side structure schematic diagram of the top steel reinforcement cage according to an exemplary embodiment;

[0021] Figure 3is a front structural schematic view of a middle reinforcement cage according to an exemplary embodiment;

[0022] Figure 4 is a side structural schematic view of a middle reinforcement cage according to an exemplary embodiment;

[0023] Figure 5 is a front structural schematic view of a bottom reinforcement cage according to an exemplary embodiment;

[0024] Figure 6 is a side structural schematic view of a bottom reinforcement cage according to an exemplary embodiment;

[0025] Figure 7 is a structural schematic view of a vertical segmented underground continuous wall deformation monitoring structure according to an exemplary embodiment.

[0026] Wherein, the reference signs are as follows: 1-reinforcement cage, 2-monitoring optical fiber, 3-second protection pipe, 4-first protection pipe, 5-reserved optical fiber, 6-U-shaped protection pipe, 7-lap joint segment reinforcement, 8-communication optical cable, 9-optical fiber demodulator, 10-fourth protection pipe, 11-third protection pipe. DETAILED DESCRIPTION

[0027] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings; however, these embodiments can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the several views of the drawings, and thus description of the same will be simplified or omitted.

[0028] The terms "one", "a", "an", "the", "said", are used to denote one or more elements / components / etc.; the terms "include" and "have" are used to indicate an open inclusive meaning and that additional elements / components / etc. can be present in addition to those listed.

[0029] Referring to Figures 1 to 7 The embodiment of the present application provides a vertical segmented underground continuous wall deformation monitoring structure, which comprises a plurality of reinforcement cages 1 and monitoring optical fibers 2.

[0030] The plurality of reinforcement cages 1 are sequentially connected from bottom to top, at least one of the adjacent two reinforcement cages 1 has a lap joint segment reinforcement 7, and the adjacent two reinforcement cages 1 are welded through the lap joint segment reinforcement 7. The plurality of reinforcement cages 1 can be hoisted in sequence and welded together through the lap joint segment reinforcement 7, which can adapt to the situation that the construction site is small or the construction site is limited by high-voltage lines and other construction environments.

[0031] The number of steel cages 1 is at least two. The plurality of steel cages 1 comprises at least a bottom steel cage 1 and a top steel cage 1. When the number of steel cages 1 is three or more, the plurality of steel cages 1 further comprises at least one intermediate steel cage 1. When hoisted, the bottom steel cage 1 is hoisted to the target position first, then the intermediate steel cage 1 is hoisted in sequence, and welding is performed, and finally the top steel cage 1 is hoisted.

[0032] The monitoring optical fiber 2 is arranged on each steel cage 1, and the monitoring optical fiber 2 extends along the vertical steel bars of the steel cage 1 and is fixed. The monitoring optical fiber 2 is symmetrically arranged on both sides of the thickness direction of each steel cage 1. The monitoring optical fiber 2 on the bottom steel cage 1 is in a U shape. The monitoring optical fiber 2 on at least one of the two adjacent steel cages 1 has a reserved optical fiber 5. The monitoring optical fiber 2 on the two adjacent steel cages 1 after welding is fused through the reserved optical fiber 5. The monitoring optical fiber 2 is arranged on each steel cage 1 respectively. After the steel cages 1 are hoisted and welded respectively, the monitoring optical fiber 2 on the two steel cages 1 can be fused, so that the overall arrangement of the monitoring optical fiber 2 on the diaphragm wall can be realized, and the deformation of the diaphragm wall can be monitored.

[0033] In the vertical segmented diaphragm wall deformation monitoring structure, a plurality of steel cages 1 can be hoisted to the target position in sequence respectively, and are welded into a whole through the lap joint steel bars 7. The monitoring optical fiber 2 is arranged on each steel cage 1 respectively, and the monitoring optical fiber 2 is fused through the reserved optical fiber 5 after the steel cages 1 are welded. The problem of difficult optical fiber arrangement of the segmented diaphragm wall is solved, and the deformation of the segmented diaphragm wall can be monitored.

[0034] The monitoring optical fiber 2 can comprise a strain sensing optical fiber and a temperature compensation optical fiber. The strain sensing optical fiber and the temperature compensation optical fiber can be fixed on each steel cage 1 in advance according to design, so that the strain sensing optical fiber and the temperature compensation optical fiber can be connected into a whole after the steel cages 1 are hoisted and welded respectively.

[0035] In some embodiments, the monitoring optical fiber 2 is fixed by binding with the vertical steel bars. The monitoring optical fiber 2 is fixed along the vertical steel bars by binding, which is simple and convenient to operate. The monitoring optical fiber 2 is fixed along the vertical steel bars, and can gradually extend from the bottom steel cage 1 upwards until extending above the top steel cage 1, so as to be connected with external equipment such as the optical fiber demodulator 9.

[0036] In some embodiments, the monitoring optical fiber 2 is fixed with the vertical steel bars by cross binding. The monitoring optical fiber 2 can be fixed firmly on the vertical steel bars by cross binding, and the optical fiber can be ensured to be in a tensioned state.

[0037] The binding distance of the binding tape of the monitoring optical fiber 2 can be 20-30 cm, so as to ensure that the optical fiber is in a tensioned state and avoid relaxation.

[0038] In some embodiments, referring to Figure 5 and Figure 6 A U-shaped protection tube 6 is arranged on the bottom steel cage 1, and the monitoring optical fiber 2 passes through the U-shaped protection tube 6. The monitoring optical fiber 2 is symmetrically arranged on both sides of the thickness direction of the steel cage 1, and the monitoring optical fiber 2 on the bottom steel cage 1 is arranged in a U shape, so that the monitoring optical fiber 2 on the bottom steel cage 1 remains as a whole by turning at the bottom. The bottom of the bottom steel cage 1 is provided with a U-shaped protection tube, and the monitoring optical fiber 2 passes through the U-shaped protection tube, which can prevent the monitoring optical fiber 2 from being bent and can prevent damage to the bottom optical fiber during concrete pouring.

[0039] The turning radius of the monitoring optical fiber 2 can be determined according to the thickness of the steel cage 1. In an exemplary embodiment, the turning radius of the monitoring optical fiber 2 is greater than 100 mm.

[0040] In some embodiments, the U-shaped protection tube 6 can be a metal tube or a plastic tube. The plastic tube can specifically include a PU (polyurethane) tube, a PVC (polyvinyl chloride) tube, etc.

[0041] In some embodiments, referring to Figure 1 and Figure 2 Among the plurality of steel cages 1, at least the top steel cage 1 is provided with a first protection tube 4, the first protection tube 4 is arranged on the upper part of the top steel cage 1, extends along the vertical steel and is fixed, the monitoring optical fiber 2 passes through the first protection tube 4, the upper end of the first protection tube 4 is connected with a second protection tube 3, the first protection tube 4 communicates with the second protection tube 3, the reserved optical fiber 5 on the top steel cage 1 is accommodated in the second protection tube 3, and the pipe opening of the second protection tube 3 is sealed with an end cap. The reserved optical fiber 5 is protected by the first protection tube 4 and the second protection tube 3 to prevent the reserved optical fiber 5 from being damaged during concrete construction.

[0042] In some embodiments, the first protection tube 4 is a metal tube. In a specific implementation, the first protection tube 4 can be a steel tube. The first protection tube 4 is welded to the vertical steel.

[0043] The second protection tube 3 can be a metal tube or a plastic tube. In an exemplary embodiment, the plastic tube can include a PU tube and a PVC tube.

[0044] In some embodiments, the pipe diameter of the second protection tube 3 is greater than the pipe diameter of the first protection tube 4, and the second protection tube 3 is connected with the first protection tube 4 through a reducing joint. The first protection tube 4 adopts a smaller pipe diameter, which can effectively protect the monitoring optical fiber 2 and will not affect the structure of the steel cage 1. The second protection tube 3 adopts a larger pipe diameter, which can facilitate the accommodation of the reserved optical fiber 5.

[0045] The pipe diameter of the first protection tube 4 can be, for example, 2 cm, and the length can be 50 cm. The pipe diameter of the second protection tube 3 can be, for example, 30 cm.

[0046] In a specific implementation, a steel pipe with a diameter of 2 cm and a length of 50 cm is welded on the side of the vertical steel bar that leads the reserved optical fiber 5 to the ground, the monitoring optical fiber 2 is inserted into the steel pipe, the top of the steel pipe is connected to a PVC pipe, the reserved optical fiber 5 is coiled into a coil and placed in the PVC pipe, and the pipe opening is sealed with an end cap.

[0047] In some embodiments, the second protection pipe 3 is arranged perpendicularly to the first protection pipe 4.

[0048] In some embodiments, referring to Figure 7 , the third protection pipe 11 is sleeved at the fusion joint of the monitoring optical fiber 2 on the adjacent two steel cages 1. The third protection pipe 11 can be fixed with the vertical steel bar. The third protection pipe 11 can be a metal pipe or a plastic pipe. The metal pipe can include a steel pipe, for example. The plastic pipe can include a PU pipe and a PVC pipe.

[0049] Before the steel cage 1 is welded and the monitoring optical fiber 2 is fused, the reserved optical fiber 5 is inserted through the third protection pipe 11, then the monitoring optical fiber 2 on the adjacent two steel cages 1 is fused, the third protection pipe 11 is moved to the fusion joint, and the third protection pipe 11 is fixed with the vertical steel bar. In a specific implementation, the third protection pipe 11 is a steel pipe, which can be welded with the vertical steel bar.

[0050] In some embodiments, the reserved optical fiber 5 can be coiled into a coil.

[0051] Taking three-section steel reinforcement cage 1 as an example, the steel reinforcement cage 1 is respectively a top steel reinforcement cage 1, a middle steel reinforcement cage 1 and a bottom steel reinforcement cage 1. During construction, the three-section steel reinforcement cage 1 is sequentially lowered by section, and a lap joint section steel reinforcement 7 is arranged between the sections and welded. The bottom steel reinforcement cage 1 is first hoisted and lowered, the steel reinforcement lap joint section and the reserved optical fiber 5 are exposed to the ground, the middle steel reinforcement cage 1 is welded with the lap joint section of the bottom steel reinforcement cage 1, after the welding is completed, the reserved optical fiber 5 coils of the two sections are opened, a steel pipe with a diameter of 2 cm and a length of 50 cm is sleeved in advance, the reserved coil is cut to an appropriate length and is fused, after the fusion is completed, the steel pipe sleeved in advance is moved to the fusion point and is welded on the steel reinforcement, so that the fusion point of the optical fiber is prevented from being damaged by the grouting pipe or the concrete. The connection of the top steel reinforcement cage 1 and the middle steel reinforcement cage 1 and the connection mode of the monitoring optical fiber 2 on the two are the same as those described above. After the welding, the steel reinforcement cage 1 is lowered to the steel reinforcement lap joint section of the middle steel reinforcement cage 1 and the reserved optical fiber 5 is exposed to the ground, the top steel reinforcement cage 1 is welded with the lap joint section of the middle steel reinforcement cage 1, then the steel pipe is sleeved and the monitoring optical fiber 2 is fused. After the concrete of the underground continuous wall is poured, the optical fiber protected in advance at the top is opened, a fourth protection pipe 10 is sleeved in advance, the material of the fourth protection pipe 10 can be the same as that of the other protection pipes, and in specific implementation, a high-strength PU pipe can be used. The strain sensing optical fiber and the temperature compensation optical fiber are respectively fused with the communication optical cable 8, the pipe is moved to the fusion point, is fixed by using high-pressure adhesive tape, and is prevented from being damaged. A ditch with a depth of about 10 cm is dug in the construction site, the communication optical cable 8 is buried in the soil and is led to a monitoring station outside the construction site, and is connected to an optical fiber demodulator 9, so that the strain change of the underground continuous wall body can be obtained.

[0052] The embodiment of the utility model provides a kind of underground continuous wall body, including the vertical sectional underground continuous wall deformation monitoring structure of the utility model embodiment.

[0053] In the embodiment of the utility model, the term "a plurality of" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connecting", "fixing" and the like should be understood broadly, for example, "connecting" can be fixed connection, can also be detachable connection, or integrated connection. For ordinary skilled in the art, the specific meaning of the above terms in the embodiment of the utility model can be understood according to specific circumstances.

[0054] In the description of the embodiment of the utility model, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the embodiment of the utility model and simplifying the description, and does not indicate or imply that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the embodiment of the utility model.

[0055] In the description of the present specification, the description of the terms "one embodiment", "one preferred embodiment" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0056] The above is only the preferred embodiment of the present application, and is not intended to limit the embodiments of the present application. For those skilled in the art, the embodiments of the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present application shall be included in the protection scope of the embodiments of the present application.

Claims

1. A vertical sectional diaphragm wall deformation monitoring structure, characterized in that, The utility model relates to a vertical sectional type underground continuous wall deformation monitoring structure, which comprises a plurality of steel cages connected in sequence from bottom to top, at least one of the adjacent two steel cages has a lap joint segment steel, and the adjacent two steel cages are welded through the lap joint segment steel. A monitoring optical fiber is arranged on each steel cage and extends along and is fixed to vertical steel bars of the steel cage, the monitoring optical fiber is symmetrically arranged on both sides in the thickness direction of the steel cage, the monitoring optical fiber on the bottom steel cage is in a U shape, the monitoring optical fiber on at least one of the adjacent two steel cages has a reserved optical fiber, and the monitoring optical fibers on the adjacent two steel cages after welding are fusion spliced through the reserved optical fiber. The monitoring optical fiber is fixed to the vertical steel bars through binding.

2. The vertical segmented diaphragm wall deformation monitoring structure according to claim 1, characterized in that, The monitoring optical fiber is fixed to the vertical steel bars through cross binding.

3. The vertical segmented diaphragm wall deformation monitoring structure according to claim 2, wherein, A U-shaped protection tube is arranged on the bottom steel cage, and the monitoring optical fiber passes through the U-shaped protection tube.

4. The vertical segmented diaphragm wall deformation monitoring structure according to claim 1, characterized in that, The U-shaped protection tube is a PU tube.

5. The vertical segmented diaphragm wall deformation monitoring structure according to claim 4, characterized in that, Among the plurality of steel cages, at least the top steel cage is provided with a first protection tube, the first protection tube is arranged at the upper part of the top steel cage, extends along and is fixed to the vertical steel bars, the monitoring optical fiber passes through the first protection tube, an upper end of the first protection tube is connected with a second protection tube, the first protection tube communicates with the second protection tube, the reserved optical fiber on the top steel cage is contained in the second protection tube, and a pipe opening of the second protection tube is sealed with an end cover.

6. The vertical segmented diaphragm wall deformation monitoring structure according to claim 1, wherein, The first protection tube is a metal tube, and the first protection tube is welded to the vertical steel bars; the second protection tube is a PVC tube.

7. The vertical segmented diaphragm wall deformation monitoring structure according to claim 6, characterized in that, The pipe diameter of the second protection tube is larger than that of the first protection tube, and the second protection tube is connected with the first protection tube through a reducing joint.

8. The vertical segmented diaphragm wall deformation monitoring structure according to claim 6, characterized in that, A third protection tube is sleeved on the fusion splicing point of the monitoring optical fibers on the adjacent two steel cages.

9. The vertical segmented diaphragm wall deformation monitoring structure according to claim 1, wherein, The utility model relates to a vertical sectional type underground continuous wall deformation monitoring structure.

10. An underground diaphragm wall, characterised in that, ​

Images