A step-by-step grooving construction method for an orifice guide frame and a special-shaped grooving section of a ground-connected wall

Abstract

The present invention discloses an elongated orifice guide frame and a step-by-step grooving construction method for special-shaped groove sections of ground-connected walls; the elongated orifice guide frame includes a limit frame, lifting ears are provided on both sides of the limit frame, a reaction plate is provided on the bottom, a positioning support is installed on the reaction plate, the positioning support is composed of a foot support and a positioning nut, one end of the foot support is a screw rod, the positioning nut can move along the screw rod and fix the relative position of the positioning support and the limit frame. The step-by-step grooving construction method for special-shaped groove sections of ground-connected walls optimizes the grooving sequence of special-shaped ground-connected walls based on the elongated orifice guide frame, constructs the short side direction first and then the long side direction, and can fully utilize the correction function of the double-wheel milling correction plate. The present invention is applied to the construction of special-shaped groove sections of ground-connected walls to avoid the misalignment and deviation of adjacent milling sections and improve the verticality of the current milling section.

Description

Technical Field

[0001] The invention relates to the technical field of bridge foundation construction, in particular to a method for constructing an orifice guide frame and a step-by-step grooving construction method of special-shaped grooving sections of a ground-connected wall. Background Art

[0002] A diaphragm wall is a construction process that involves excavating a deep trench around the proposed underground structure using a slurry retaining wall. A reinforcement cage is then placed into the trench and concrete is poured, ultimately forming a continuous concrete wall. Double-wheel milling diaphragm walls were initially widely used as retaining structures for large foundation pits due to their high efficiency, minimal footprint, and high rigidity. With the continuous advancement of construction technology, their role has gradually shifted from temporary retaining structures for water and seepage control to permanent structures.

[0003] As their functionality increases, underground diaphragm walls are becoming increasingly complex. Structural forms such as compartmentalized diaphragm walls have been applied in scenarios such as large bridge foundations. This increased complexity in diaphragm wall structures has led to an increase in the size and variety of diaphragm segment types. Current diaphragm wall construction involves not only conventional straight-shaped segments but also specialized segments such as L-shaped, T-shaped, and cross-shaped segments.

[0004] Grooving machines used in ground-anchored wall construction typically use a double-wheel milling machine or a hydraulic grab bucket. The double-wheel milling machine has better adaptability to strata and is widely used in various ground-anchored wall projects. The scope of a double-wheel milling machine's one-time grooving is generally referred to as "one milling" or "one cut." To ensure the verticality of the grooving, the double-wheel milling machine typically has a matching orifice guide frame, but its size is relatively small and its application only covers "one milling." Traditional grooving sections are small in size and simple in structure. During construction, "one milling" usually results in a single grooving section. Since it can form a grooving section in one go, the traditional orifice guide frame is sufficient to control the verticality of the grooving section.

[0005] However, due to the structural form of the special-shaped slot segments, it is often necessary to mill multiple slots, that is, the double-wheel slot milling process will inevitably require lifting and moving the machine, and shifting the slots. Although the traditional hole guide frame can ensure the verticality of the current construction part to a certain extent, under the background of multiple slot milling, there may be misalignment at different slot milling stages, which will eventually lead to slot segment dislocation and twisting, affecting the subsequent lifting of the steel cage and the quality of the ground-connected wall. At the same time, since the special-shaped slot segments need to be milled multiple times, the slot segments are often in a vertical relationship. If there is a problem with the order of milling the slots, it may cause the double-wheel milling correction plate to be in the air, making it impossible to correct the deviation in real time, affecting the construction quality of the double-wheel slot milling. Summary of the Invention

[0006] In response to the shortcomings of the existing technology, the present invention provides a hole guide frame and a step-by-step trenching construction method for special-shaped trench sections of ground-connected walls, which can effectively reduce the possibility of trench section dislocation and twisting during the trenching process of special-shaped trenches and improve the quality of trenching construction.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A hole guide frame includes a limit frame, a group of reaction plates and a group of positioning supports for contacting and positioning with the ground-connected wall guide wall. The limit frame is a rectangular frame structure, the reaction plates are arranged below the corresponding corners of the limit frame, and the positioning supports are adjustably arranged on the reaction plates.

[0009] A group of protruding lifting ears are provided on the outer side of the limiting frame.

[0010] The positioning support includes a foot support and a positioning nut. The reaction plate is provided with a connecting hole that matches the foot support, and the positioning nut is arranged on the foot support for positioning.

[0011] The limiting frame is an integral structure formed of a square tube.

[0012] There are four lifting ears, which are arranged on two opposite sides of the limiting frame.

[0013] The lifting ear is a flat plate structure, the inner end of the flat plate structure is welded to the side of the limiting frame, and a lifting hole is provided on the flat plate structure.

[0014] The outer end of the foot support is a flat head structure, and the other end of the foot support is a screw rod.

[0015] There are two positioning nuts, which are respectively arranged on both sides of the corresponding reaction plate and cooperate with the screw rod.

[0016] A step-by-step trenching construction method for special-shaped trench sections of a ground-connected wall comprises the following steps:

[0017] S1. First, install the positioning nut on the screw and insert the screw into the connection hole of the reaction plate;

[0018] S2. The surveyor marks out the edge of the slot section on the guide wall, inserts the lifting sling into the lifting lug, uses the lifting equipment to lift the extended hole guide frame to the slot, and makes preliminary adjustments to the position of the extended hole guide frame so that its edge is basically aligned with the slot section edge;

[0019] S3. Adjust the position of the extended orifice guide frame again so that the edge of the extended orifice guide frame coincides with the edge of the slot section; after the position adjustment is completed, make the four foot supports closely contact the guide wall, and install the positioning nut at the end of the screw rod, and then tighten the positioning nut installed this time and the positioning nut installed in step S1 toward the reaction plate so that it tightly clamps the reaction plate, thereby fixing the relative position of the positioning support and the limit frame, ensuring that the extended orifice guide frame does not move along the guide wall;

[0020] S4. After the extended orifice guide frame is fixed on the guide wall, the conventional guide frame is installed on the extended orifice guide frame so that the conventional guide frame is located at the first milling position and the conventional guide frame and the extended orifice guide frame are tightly fitted;

[0021] S5. Move the double-wheel milling machine to the conventional guide frame and perform the slot milling operation;

[0022] S6. After the milling of the current slot section is completed, the double-wheel milling machine is moved; then the conventional guide frame is moved along the extended hole guide frame to the second milling position, the conventional guide frame is installed again, and the double-wheel milling machine is continued to perform the slot milling operation.

[0023] Another method for constructing special-shaped trench sections of a ground-connected wall in steps comprises the following steps:

[0024] S1. Prioritize arranging the extended orifice guide frame and the conventional guide frame along the short side of the cross-shaped slot segment, and use a double-wheel milling machine to construct the slot segment I.

[0025] S2. After the construction of slot section I is completed, the double-wheel milling head is raised, the extended hole guide frame is kept in place, and the conventional guide frame is moved to the other side of the extended hole guide frame by the lifting equipment. Then the double-wheel milling machine is lowered to start the slot construction of slot section II.

[0026] S3. After the construction of trough section II is completed, that is, the construction in the short side direction is completed, the double-wheel milling head is raised, and the extended hole guide frame is hoisted and arranged along the long side direction. The conventional guide frame is installed, and the double-wheel milling head is lowered to start the troughing construction of trough section III;

[0027] S4. After the construction of slot section III is completed, the double-wheel milling head is raised, the extended hole guide frame is kept in place, and the conventional guide frame is moved to the other side of the extended hole guide frame by the lifting equipment. Then the double-wheel milling machine is lowered to start the slot construction of slot section IV.

[0028] S5. After the construction of slot section IV is completed, the construction of the current cross-shaped slot section is completed. Move the extended orifice guide frame and other equipment to the next slot section, and carry out construction according to the installation and use process of the extended orifice guide frame and the step-by-step slot construction method of the special-shaped slot section.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] The hole mouth guide frame and the step-by-step grooving construction method for the special-shaped groove sections of the ground-connected wall are reasonably designed. The extended hole mouth guide frame can avoid positioning errors caused by lifting and moving the milling machine during the grooving construction process, limit the tail of the piece between adjacent millings, and thus realize the control of the groove section misalignment and deviation during the multiple milling of the special-shaped groove sections; at the same time, the step-by-step grooving construction method for the special-shaped groove sections can fully utilize the correction effect of the double-wheel milling correction plate to avoid the correction plate being in the air, thereby better controlling the verticality of the groove section. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The following is a brief description of the contents and symbols in the drawings of this specification:

[0032] Figure 1 It is a schematic diagram of the axial side of the orifice guide frame of the present invention.

[0033] Figure 2 This is a schematic diagram of the combined use of the orifice guide frame of the present invention and a conventional guide frame.

[0034] Figure 3 It is a top view schematic diagram of the orifice guide frame of the present invention.

[0035] Figure 4 It is a front view schematic diagram of the orifice guide frame of the present invention.

[0036] Figure 5 It is a side view schematic diagram of the orifice guide frame of the present invention.

[0037] Figure 6 It is a schematic diagram of the axis side of the limit frame of the present invention.

[0038] Figure 7 This is a schematic diagram of the positioning support shaft side of the present invention.

[0039] Figure 8 This is a schematic diagram of the use of the orifice guide frame of the present invention.

[0040] Figure 9 It is a schematic diagram of the dimensions of the cross slot section of the present invention.

[0041] Figure 10 Schematic diagram of the construction sequence 1 of the cross groove section of the present invention.

[0042] Figure 11 for Figure 10 Schematic diagram of the correction plate's posture during construction.

[0043] Figure 12 This is a schematic diagram of the construction sequence 2 of the cross groove section of the present invention.

[0044] Figure 13 for Figure 12Schematic diagram of the correction plate's posture during construction.

[0045] Figure 14 It is a schematic diagram of the arrangement of the orifice guide frame along the short side direction of the present invention.

[0046] Figure 15 It is a schematic diagram of the arrangement of the orifice guide frame along the long side direction of the present invention.

[0047] In the picture:

[0048] 1-Limiting frame; 11-Lifting ear; 12-Reaction plate; 13-Connecting hole; 2-Positioning support; 21-Positioning nut; 22-Foot support; 23-Screw rod; 3-Conventional guide frame. DETAILED DESCRIPTION

[0049] The specific implementation of the present invention will be further explained in detail below through description of embodiments with reference to the accompanying drawings.

[0050] like Figures 1 to 15 As shown, the extended hole guide frame includes a limit frame and a group of positioning supports for contacting and positioning with the ground-connected wall guide wall. The limit frame is a rectangular frame. Four lifting ears are arranged on the outside of the limit frame, and four reaction plates are arranged on the bottom. Connection holes are provided on the reaction plates. The positioning support includes a foot support and a positioning nut. One end of the foot support is circular and the other end is a screw rod. The positioning nut can be connected to the foot support through the screw rod.

[0051] The screw rod of the foot support can pass through the connecting hole on the reaction plate of the limit frame, and the positioning nut can be fastened to the foot support and arranged on both sides of the reaction plate to fix the relative position of the foot support and the limit frame.

[0052] The limit frame is an integral structure formed by a square tube; there are four lifting ears, which are arranged on opposite sides of the limit frame; further, the lifting ears are a flat plate structure, the inner end of the flat plate structure is welded to the side of the limit frame, and a lifting hole is provided on the flat plate structure for easy lifting. Since the width of the relatively arranged lifting ears is greater than the width of the slot, it is stable and reliable.

[0053] The outer end of the foot support is a flat head structure, and the other end of the foot support is a screw rod; there are two positioning nuts, which are respectively arranged on both sides of the corresponding reaction plate and cooperate with the screw rod, with a simple structure and reliable positioning.

[0054] During use, the relative position of the positioning nut and the foot support screw on the positioning support can be adjusted so that the positioning support contacts the guide wall, thereby locating the limit frame and fixing its position.

[0055] When in use, the extended hole guide frame can be fixed to the slot, and then the traditional guide frame can be installed above the extended hole guide frame to constrain the verticality of the milling slot.

[0056] The present invention also provides a step-by-step grooving construction method for a special-shaped grooving segment. The method is described by taking a cross-shaped grooving segment as an example. Assuming that the width of the grooving segment is W and the length of the double-wheel milling is L, the long side length A of the cross-shaped grooving segment is L for:

[0057] A L =2L+W

[0058] The short side length A of the cross-shaped groove segment S for:

[0059] A S =2L

[0060] The construction is divided into four parts: milling grooves. If the long side is constructed first (such as Figure 10 ), it will cause the double-wheel milling correction plate to be empty during the later short side construction (such as Figure 11 ), if the short side is constructed first (such as Figure 12 ), then in the later construction of the long side direction, the double-wheel milling correction plate can still contact the groove wall, and there will be no empty situation (such as Figure 13 ), thereby achieving real-time adjustment of the trough verticality.

[0061] When constructing a cross-shaped trough section by giving priority to the short side, the extended hole guide frame can be installed along the short side of the trough section first, and the troughing construction can be carried out. After the troughing of the short side is completed, the extended hole guide frame can be installed along the long side, thereby ensuring that the two trough sections in the short and long sides will not be misaligned or offset.

[0062] The present invention can avoid the positioning error caused by lifting and moving the milling machine during the grooving construction process through the extended hole guide frame, limit the tail of the piece between adjacent milling, and thus realize the control of the groove segment misalignment and deviation during the multi-milling grooving of special-shaped groove segments; at the same time, the step-by-step grooving construction method of the special-shaped groove segment is adopted, which can fully utilize the correction effect of the double-wheel milling correction plate to avoid the correction plate being in the air, thereby better controlling the verticality of the groove segment.

[0063] Specific preferred embodiments of the present invention are:

[0064] The present invention includes a limit frame 1, which is a rectangular frame with four lifting ears 11 symmetrically arranged on both sides of the limit frame 1. The lifting equipment can move and install the present invention through the lifting ears 11. Four reaction plates 12 are symmetrically arranged below the limit frame 1, and each reaction plate 12 is provided with a connection hole 1.

[0065] The present invention also includes a positioning support 2, which is composed of a foot support 22 and a positioning nut 21. One end of the foot support 22 is circular, and the other end is provided with a screw rod 23. The positioning nut 21 can be turned along the screw rod 23.

[0066] The foot support 22 can be inserted into the connecting hole 1 to be connected to the reaction plate 12. Before the foot support 22 is inserted into the connecting hole 1, 1-2 positioning nuts 21 can be pre-installed. After the foot support 22 is inserted into the connecting hole 2, the positioning nuts 21 can be installed on the other side, and the positioning nuts 21 installed on both sides of the reaction plate 12 are twisted in the opposite direction so that the positioning nuts 21 move toward the reaction plate 12 and are tightened, so that the relative position relationship between the foot support 22 and the limit frame 1 can be determined.

[0067] When the present invention is used to construct a special trench section, the method of use is as follows:

[0068] (1) First, install the positioning nut on the screw and insert the screw into the connecting hole.

[0069] (2) The surveyor marks out the edge of the slot section on the guide wall, inserts the lifting sling into the lifting lug, uses the lifting equipment to lift the extended hole guide frame to the slot, and makes preliminary adjustments to the position of the extended hole guide frame so that its edge is basically aligned with the edge of the slot section.

[0070] (3) Adjust the position of the extended orifice guide frame again so that the edge of the extended orifice guide frame coincides with the edge of the slot section. After the position adjustment is completed, make the four foot supports closely contact the guide wall, and install the positioning nut at the end of the screw rod. Then tighten the positioning nut installed this time and the positioning nut installed in step (1) toward the reaction plate so that it tightly clamps the reaction plate, thereby fixing the relative position of the positioning support and the limit frame, ensuring that the extended orifice guide frame will not move along the guide wall.

[0071] (4) After the extended hole guide frame is fixed on the guide wall, the conventional guide frame is installed on the extended hole guide frame so that the conventional guide frame is located at the first milling position and the conventional guide frame and the extended hole guide frame are tightly fitted.

[0072] (5) Move the double-wheel milling machine to the conventional guide frame and perform the groove milling operation.

[0073] (6) After the milling of the current slot section is completed, the double-wheel milling machine is moved. Then the conventional guide frame is moved along the extended hole guide frame to the second milling position, the conventional guide frame is installed again, and the double-wheel milling machine is used to continue the slot milling operation.

[0074] The present invention also includes a step-by-step grooving construction method for special-shaped grooving segments based on an extended orifice guide frame:

[0075] (1) The extended hole guide frame and the conventional guide frame are preferably arranged along the short side direction of the cross-shaped slot section, and the double-wheel milling is used to carry out the slot construction of slot section I.

[0076] (2) After the construction of slot section I is completed, the double-wheel milling head is raised, the position of the extended hole guide frame remains unchanged, and the conventional guide frame is moved to the other side of the extended hole guide frame by the lifting equipment. Then the double-wheel milling machine is lowered to start the slot construction of slot section II.

[0077] (3) After the construction of slot section II is completed (i.e., after the construction in the short side direction is completed), the double-wheel milling head is brought out, and the extended hole guide frame is hoisted and arranged along the long side direction, the conventional guide frame is installed, and the double-wheel milling head is lowered to carry out the slotting construction of slot section III.

[0078] (4) After the construction of slot section III is completed, the double-wheel milling head is raised, the position of the extended hole guide frame is kept unchanged, and the conventional guide frame is moved to the other side of the extended hole guide frame by the lifting equipment. Then the double-wheel milling machine is lowered to start the slot construction of slot section IV.

[0079] (5) After the construction of slot section IV is completed, the construction of the current cross-shaped slot section is completed, and the extended hole guide frame and other equipment are moved to the next slot section. The construction is carried out according to the installation and use process of the extended hole guide frame and the step-by-step slot construction method of the special-shaped slot section.

[0080] The above is only an illustration of a preferred embodiment of the present invention. The above technical features can be arbitrarily combined to form multiple embodiments of the present invention.

[0081] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A method for constructing a special-shaped trench section of a ground-connected wall in a step-by-step manner using an orifice guide frame, wherein the orifice guide frame comprises a limit frame, a set of reaction plates, and a set of positioning supports for contacting and positioning the guide wall of the ground-connected wall. The limit frame is a rectangular frame structure, the reaction plates are located below the corresponding corners of the limit frame, and the positioning supports are adjustably located on the reaction plates; the method is characterized by: The step-by-step troughing construction method comprises the following steps: S1. First, install the positioning nut on the screw and insert the screw into the connection hole of the reaction plate; S2. The surveyor marks out the edge of the slot section on the guide wall, inserts the lifting sling into the lifting lug, uses the lifting equipment to lift the extended hole guide frame to the slot, and makes preliminary adjustments to the position of the extended hole guide frame so that its edge is basically aligned with the slot section edge; S3. Adjust the position of the extended orifice guide frame again so that the edge of the extended orifice guide frame coincides with the edge of the slot section; after the position adjustment is completed, make the four foot supports closely contact the guide wall, and install the positioning nut at the end of the screw rod, and then tighten the positioning nut installed this time and the positioning nut installed in step S1 toward the reaction plate so that it tightly clamps the reaction plate, thereby fixing the relative position of the positioning support and the limit frame, ensuring that the extended orifice guide frame does not move along the guide wall; S4. After the extended orifice guide frame is fixed on the guide wall, the conventional guide frame is installed on the extended orifice guide frame so that the conventional guide frame is located at the first milling position and the conventional guide frame and the extended orifice guide frame are tightly fitted; S5. Move the double-wheel milling machine to the conventional guide frame and perform the slot milling operation; S6. After the milling of the current slot section is completed, the double-wheel milling machine is moved; then the conventional guide frame is moved along the extended hole guide frame to the second milling position, the conventional guide frame is installed again, and the double-wheel milling machine is continued to perform the slot milling operation.

2. A method for constructing special-shaped trench sections of a ground-connected wall in stages using an orifice guide frame, wherein the orifice guide frame comprises a limit frame, a set of reaction plates, and a set of positioning supports for contacting and positioning the guide wall of the ground-connected wall. The limit frame is a rectangular frame structure, the reaction plates are located below the corresponding corners of the limit frame, and the positioning supports are adjustably located on the reaction plates; the method is characterized by: The step-by-step troughing construction method comprises the following steps: S1. Prioritize arranging the extended orifice guide frame and the conventional guide frame along the short side of the cross-shaped slot segment, and use a double-wheel milling machine to construct the slot segment I. S2. After the construction of slot section I is completed, the double-wheel milling head is raised, the extended hole guide frame is kept in place, and the conventional guide frame is moved to the other side of the extended hole guide frame by the lifting equipment. Then the double-wheel milling machine is lowered to start the slot construction of slot section II. S3. After the construction of trough section II is completed, that is, the construction in the short side direction is completed, the double-wheel milling head is raised, and the extended hole guide frame is hoisted and arranged along the long side direction. The conventional guide frame is installed, and the double-wheel milling head is lowered to start the troughing construction of trough section III; S4. After the construction of slot section III is completed, the double-wheel milling head is raised, the extended hole guide frame is kept in place, and the conventional guide frame is moved to the other side of the extended hole guide frame by the lifting equipment. Then the double-wheel milling machine is lowered to start the slot construction of slot section IV. S5. After the construction of slot section IV is completed, the construction of the current cross-shaped slot section is completed. Move the extended orifice guide frame and other equipment to the next slot section, and carry out construction according to the installation and use process of the extended orifice guide frame and the step-by-step slot construction method of the special-shaped slot section.

3. The step-by-step trenching construction method for special-shaped trench sections of a ground-connected wall as claimed in claim 2 is characterized by: A group of protruding lifting ears are provided on the outer side of the limiting frame.

4. The step-by-step trenching construction method for special-shaped trench sections of a ground-connected wall as claimed in claim 2, characterized in that: The positioning support includes a foot support and a positioning nut. The reaction plate is provided with a connecting hole that matches the foot support, and the positioning nut is arranged on the foot support for positioning.

5. The step-by-step trenching construction method for special-shaped trench sections of ground-connected walls according to claim 2, characterized in that: The limiting frame is an integral structure formed of a square tube.

6. The step-by-step trenching construction method for special-shaped trench sections of ground-connected walls as claimed in claim 3, characterized in that: There are four lifting ears, which are arranged on two opposite sides of the limiting frame.

7. The step-by-step trenching construction method for special-shaped trench sections of a ground-connected wall as claimed in claim 3, characterized in that: The lifting ear is a flat plate structure, the inner end of the flat plate structure is welded to the side of the limiting frame, and a lifting hole is provided on the flat plate structure.

8. The step-by-step trenching construction method for special-shaped trench sections of a ground-connected wall as claimed in claim 4, characterized in that: The outer end of the foot support is a flat head structure, and the other end of the foot support is a screw rod.

9. The step-by-step trenching construction method for special-shaped trench sections of ground-connected walls according to claim 8, characterized in that: There are two positioning nuts, which are respectively arranged on both sides of the corresponding reaction plate and cooperate with the screw rod.

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