CN113389405A - Integral moving and modifying structure and moving and modifying method for small and medium-sized ancient well structure - Google Patents
Integral moving and modifying structure and moving and modifying method for small and medium-sized ancient well structure Download PDFInfo
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- CN113389405A CN113389405A CN202110689355.6A CN202110689355A CN113389405A CN 113389405 A CN113389405 A CN 113389405A CN 202110689355 A CN202110689355 A CN 202110689355A CN 113389405 A CN113389405 A CN 113389405A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/06—Separating, lifting, removing of buildings; Making a new sub-structure
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/06—Separating, lifting, removing of buildings; Making a new sub-structure
- E04G23/065—Lifting of buildings
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Abstract
The invention provides a whole moving and modifying structure and a moving and modifying method of a small and medium-sized ancient well structure. According to the integral moving and modifying structure and the moving and modifying method for the ancient well structure, the steel wire rope is used as the rope saw to cut the soil body, so that the hoisting support is arranged, the foundation replacement of the ancient well structure is completed, the protection of the ancient well and the convenience of hoisting and transferring construction are both considered, the construction is safe and reliable, and the safety and the stability in the ancient well moving and modifying process can be guaranteed.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a small and medium-sized ancient well structure integral moving and modifying structure and a moving and modifying method thereof.
Background
The Chinese culture is huge and profound, and the history is long, and the retention of cultural relics is not only the exhibition of the cultural essence of China, but also a reflection of the development of the current times. For cultural relic protection work, historical culture is protected, and the promotion and inheritance of national culture can be greatly promoted. However, as the range of urban construction and transformation is continuously expanded, the ancient cultural relics are inevitably and frequently protected. The conflict trend between project construction and cultural protection is more obvious, and one of important methods for solving the conflict in the overall migration protection technology of small and medium-sized cultural relics is provided. Therefore, on the premise of ensuring safety and economic feasibility, how to construct the cultural relics quickly as possible according to the requirements of standardized civilized construction sites and countries on cultural relic protection becomes an important problem.
It is worth noting that in the migration and modification of small and medium-sized cultural relics, the ancient well is usually located at a certain buried depth underground, and the problems that the well wall is long-term, the weight is large, the site condition is poor, the dismantling and the replacement are difficult, the ancient well is extremely easy to be damaged in the construction process, the stability of the wall of the ancient well is difficult to guarantee, and the like exist.
Disclosure of Invention
In view of the above situation, the invention provides a whole moving and modifying structure of a small and medium-sized old well structure and a moving and modifying method thereof, wherein an annular steel casing is arranged on the periphery of an old well to serve as an outer casing, and H-shaped steel is arranged at the bottom of the old well structure to serve as a movable whole moving guide rail and a hoisting support, so that the effect of integrally hoisting the old well is achieved, and an HDPE corrugated pipe is further matched with the inner casing of the old well structure to serve as the inner casing of the old well structure, so that the effect of reducing the dead weight of a well body module is achieved; in addition, the steel wire rope is used as a rope saw to cut the soil body, so that the hoisting support is arranged, the foundation replacement of the ancient well structure is completed, the technical problem that the ancient well structure is not easy to change is solved, the integral moving and changing structure of the small and medium-sized ancient well structure and the moving and changing method thereof which take account of the protection of the ancient well and the convenience of hoisting and transferring construction are realized, the construction is safe and reliable, and the safety and the stability of the ancient well in the moving and changing process can be ensured.
In order to achieve the purpose, the invention adopts the technical scheme that an integral moving and modifying structure of a small and medium-sized ancient well structure is provided, and the ancient well structure is positioned in a construction foundation pit of a soil body; it is characterized in that the integral moving and modifying structure further comprises: the well wall stabilizing assembly comprises an inner protective cylinder, an outer protective cylinder, an inner pressure steel plate and a bottom sealing steel plate which are used for packaging and stabilizing the ancient well structure; the guide rail assembly is provided with two opposite end parts, one end part is defined as an original site position, the other end part is defined as a transfer position, and the ancient well structure and the well wall stabilizing assembly slide to the transfer position from the original site position along the guide rail assembly; the back jacking power assembly is fixedly arranged on one side of the original site position towards the back cover steel plate in a pushing manner; the hoisting bracket is arranged at the transfer position; the hoisting bracket supports the ancient well structure and the well wall stabilizing assembly to hoist and leave the pit.
The overall structure of the small-sized old well is further improved in that the old well structure is formed with an inner annular wall, an outer annular wall, a well bottom inner wall and a well bottom outer wall; in the well wall stabilizing assembly, the inner casing is arranged inside the ancient well structure, and the internal pressure steel plate is accommodated inside the inner casing and pressed on the inner wall of the well bottom; the outer protecting cylinder is arranged outside the ancient well structure, and the bottom sealing steel plate is welded and fixed with the bottom of the outer protecting cylinder to seal the bottom opening of the outer protecting cylinder; the guide rail assembly comprises two first H-shaped steel supports which are arranged oppositely and two second H-shaped steel supports which are arranged oppositely; the end parts of the two first H-shaped steel supports and the two second H-shaped steel supports are connected to form a guide rail of a moving and changing route and are arranged on two opposite sides of the bottom of the historic well structure A; defining the part of the moving and changing route corresponding to the first H-shaped steel support as the original position, and defining the part of the moving and changing route corresponding to the second H-shaped steel support as the transfer position; the back-jacking power assembly comprises a back-jacking steel beam and a hydraulic jack, wherein two ends of the back-jacking steel beam are fixedly connected with the pit wall of the construction foundation pit, the back-jacking steel beam is positioned on one side of the original site position and is arranged in a criss-cross manner on the plane with the migration route, and the hydraulic jack is fixedly arranged on the back-jacking steel beam in a pushing manner towards the historic well structure; the hoisting bracket comprises two first I-shaped steel supports and a plurality of second I-shaped steel supports fixedly connected between the two first I-shaped steel supports; the hoisting support bracket is arranged at the transfer position; therefore, the ancient well structure and the well wall stabilizing assembly are pushed by the hydraulic jack, and slide to the transfer position from the original position along the guide rail assembly and are welded with the hoisting bracket so as to integrally hoist the ancient well structure, the well wall stabilizing assembly and the hoisting bracket to form a pit.
The overall structure for the small-sized ancient well structure is further improved in that an inner backfill layer is arranged between the inner casing and the inner annular wall of the ancient well structure, and an outer backfill layer is arranged between the outer casing and the outer annular wall of the ancient well structure.
The small-sized ancient well structure is further improved in an overall moving and modifying structure, the inner protective cylinder is an HDPE double-wall corrugated pipe protective cylinder, and the outer protective cylinder is a steel annular protective cylinder.
The small-sized ancient well structure overall moving and modifying structure is further improved in that the bottom end cylinder wall of the inner protective cylinder is provided with a water drainage hole, and the water drainage hole is sealed by adopting a dense mesh steel mesh.
The overall moving and modifying structure of the small-sized old well structure is further improved in that at least two hydraulic jacks are fixedly arranged on the back jacking steel beam, and the hydraulic jacks are horizontally arranged in a vertical space between the two first H-shaped steel supports.
The overall migration and modification structure of the small-sized old well structure is further improved in that the second H-shaped steel support is obliquely arranged relative to the first H-shaped steel support, and one end, connected with the first H-shaped steel support, of the second H-shaped steel support is higher than the other end, far away from the first H-shaped steel support, of the second H-shaped steel support.
The invention also aims to provide a small and medium-sized ancient well structure integral moving and modifying method, which comprises the following steps:
pre-construction deployment step S1: determining an original site position and a transfer position of the ancient well structure migration and transformation route;
ancient well position exploration step S2: removing floating soil in a range of 10 +/-5 meters around the possible position of the ancient well structure, then scraping soil downwards in layers to clear the range of a foundation pit, and simultaneously performing artificial exploration to confirm the position of the ancient well structure;
an inner and outer casing reinforcing step S3: hoisting an outer protective sleeve at 30 +/-5 cm from the top of the ancient well structure, and removing redundant soil from the lower soil body by adopting manual soil cutting to fill the space between the outer ring wall of the ancient well and the outer protective sleeve with original soil to form an outer backfill layer; cleaning the filling soil in the pit after the outer protective cylinder is in place, and then hoisting the inner protective cylinder into the pit, so that the middle sand is filled between the inner annular wall of the ancient well and the inner protective cylinder by adopting a water ramming method to form an inner backfill layer;
rail mounting step S4: excavating partial soil bodies on two opposite sides of the bottom of the ancient well structure according to the extending direction of the migration and diversion route, and placing a guide rail assembly in a space after the soil bodies are excavated, wherein the guide rail assembly comprises a first H-shaped steel support which is oppositely arranged and is positioned at the original site position and a second H-shaped steel support which is oppositely arranged and is positioned at the transfer position, and the transfer position is provided with a hoisting support bracket; in addition, soil with the thickness of 1.5 +/-0.5 cm is reserved between the upper surface of the guide rail assembly and the bottom of the outer protective cylinder;
a sealing steel plate packaging step S5: a high-pressure water gun is adopted to flush and cooperate with a steel wire rope of the rope saw, and soil between the guide rail assembly and the outer protective cylinder is removed in sections; secondly, sequentially pushing and inserting a back cover steel plate into a space formed after soil is removed in a segmented manner by utilizing a back jacking power assembly fixedly arranged on the wall of the foundation pit, and welding and fixing the bottom of the outer casing and the back cover steel plate after the back cover steel plate is in place to close the opening at the bottom of the outer casing, so that the inner casing, the inner backfill layer, the outer casing, the outer backfill layer, the inner pressure steel plate and the back cover steel plate form a well wall stabilizing assembly coated outside the ancient well structure together;
step S6 of ancient well construction pushing and sliding: pushing the bottom sealing steel plate by using the back jacking power assembly to enable the bottom sealing steel plate to slide from the original site position to the transfer position along the guide rail assembly until the integral ancient well structure and the well wall stabilizing assembly slide to the lifting bracket at the transfer position;
and a step S7 of fixedly connecting and hoisting the hoisting bracket: and after the hoisting support bracket and the bottom sealing steel plate are welded and fixed to form a stable system, hoisting the historic well structure, the well wall stabilizing assembly and the hoisting support bracket out of the pit simultaneously.
The overall migration and modification method for the small-sized old well structure is further improved in that in the step S6 of pushing and sliding the old well structure, a plurality of brake blocks are welded on the upper surfaces of the two second H-shaped steel supports at intervals, when the old well structure and the well wall stabilizing assembly slide to abut against the brake blocks in sections, the pushing and moving are suspended until the abutting brake blocks are removed, and then the next section of displacement is carried out until the old well structure and the well wall stabilizing assembly slide to the hoisting frame.
In the method for integrally moving and modifying a small-sized old well structure according to the present invention, in the step S4 of installing the guide rails, the horizontal height of the second H-beam support is lower than the horizontal height of the first H-beam support, and the horizontal height of the second H-beam support has a height variation inclined from high to low along the moving and modifying path.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
(1) the technical scheme of the invention has the advantages of convenient construction, simple construction process and capability of greatly shortening the construction period required by the migration of the historic well, and the required construction materials are common materials on site, and the mode is mostly welding.
(2) The technical scheme of the invention is safe and stable, and a stable hoisting system is formed by welding the outer protective cylinder made of the annular steel protective cylinder and the rigid chassis (hoisting bracket) made of the I-shaped steel, so that the safety and reliability of hoisting work can be effectively ensured.
(3) The technical scheme of the invention has the characteristics of environmental protection and recycling because the used materials are mostly steel structure materials, and meets the requirement of environmental protection.
These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description and appended claims, and may be realized by means of the instrumentalities, devices and combinations particularly pointed out in the appended claims.
Drawings
FIG. 1 is a schematic plan view of the overall migration and modification structure of the small-sized ancient well structure in the invention.
FIG. 2 is a schematic cross-sectional elevation view of an ancient well construction and well wall stabilizing assembly of the present invention in situ and mounted on a rail assembly.
Figure 3 is a schematic cross-sectional elevation view of the paleo-well configuration and well wall stabilizing assembly of the present invention in a transfer position and positioned on a lifting bracket.
The correspondence of reference numerals to components is as follows:
constructing an ancient well A; well brick A1; an inner annular wall a 2; an outer annular wall A3; the bottom hole inner wall A4; a bottom hole outer wall A5; soil body B; constructing a foundation pit B1; a borehole wall stabilizing assembly 10; an inner casing 11; an inner backfill layer 12; an outer casing 13; an outer backfill layer 14; an inner pressure steel plate 15; a back cover steel plate 16; a rail assembly 20; a first H-beam support 21; a second H-beam support 22; home position P1; the transfer position P2; a jack-back power assembly 30; back-up steel beam 31; a hydraulic jack 32; hoisting the bracket 40; a first i-steel support 41; a second i-beam support 42.
Detailed Description
Detailed embodiments of the present invention will be disclosed herein. It is to be understood, however, that the disclosed embodiments are merely exemplary of the invention and that the invention may be embodied in various and alternative forms. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention.
To facilitate an understanding of the present invention, the following description is made in conjunction with the accompanying drawings and examples.
Referring to fig. 1 to 3, the present invention provides an overall structure of a middle and small sized old well structure and a technical solution of the method, wherein as shown in fig. 1 and 3, the old well structure a is built into a cylinder shape by well bricks a1 and is located in a foundation pit B1 of a soil body B, and the old well structure a is formed with an inner annular wall a2, an outer annular wall A3, a bottom outer wall a4 and a bottom outer wall a 5. As shown in fig. 1, the overall moving and modifying structure of the small and medium-sized ancient well structure comprises a well wall stabilizing component 10 covering the periphery of the ancient well structure a, a guide rail component 20 arranged at the bottom of the ancient well structure a, a back jacking power component 30 used for pushing the displacement of the ancient well structure a, and a hoisting bracket 40 used for forming a stable hoisting system with the ancient well structure a. In addition, the technical scheme of the invention can be matched with a crane and/or a plate trailer for construction.
Referring to fig. 1 and 3, the borehole wall stabilizing assembly 10 comprises an inner protective casing 11, an outer protective casing 13, an inner pressure steel plate 15 and a bottom sealing steel plate 16 which encapsulate and stabilize the ancient well structure a. Specifically, the inner casing 11 is arranged inside the historic well structure A, and the internal pressure steel plate 15 is accommodated inside the inner casing 11 and pressed on the inner wall A4 of the well bottom; the outer protecting cylinder 13 is arranged outside the historic well structure A, and the bottom sealing steel plate 16 is welded with the bottom of the outer protecting cylinder 13 to seal the bottom opening of the outer protecting cylinder 13. As shown in fig. 3, an inner backfill layer 12 is provided between the inner casing 11 and the inner annular wall a2 of the guy well structure a, and an outer backfill layer 14 is provided between the outer casing 13 and the outer annular wall A3 of the guy well structure a.
In the embodiment of the present invention, the inner casing 11 is a HDPE double-wall corrugated pipe casing, and the outer casing 13 is a steel annular casing. Preferably, the inner casing 11, the outer casing 13, the first H-shaped steel support 21 and the second H-shaped steel support 22 are made of Q235 steel.
In the embodiment of the present invention, the inner backfill layer 12 in the borehole wall stabilizing assembly 10 is formed by backfilling washed medium sand, tamping the sand by using a water tamping method, and discharging the residual water generated when the drain holes (not shown) and the dense mesh steel mesh water supply tamping method are used. The outer backfill layer 14 in the borehole wall stabilizing assembly 10 is formed by backfilling undisturbed soil.
Referring to fig. 1 and 2, the track assembly 20 has opposite ends defining an original position P1 at one end and a transfer position P2 at the other end for sliding the historic well structure a and the well wall stabilizing assembly 10 along the track assembly 20 from the original position P1 to the transfer position P2. Specifically, the guide rail assembly 20 comprises two first H-shaped steel supports 21 arranged oppositely and two second H-shaped steel supports 22 arranged oppositely; the ends of the two first H-shaped steel supports 21 and the two second H-shaped steel supports 22 are connected to form a guide rail of a diversion route and are arranged on two opposite sides of the bottom of the historic well structure A; and defining the part of the diversion route corresponding to the first H-shaped steel support 21 as the original position P1, and defining the part of the diversion route corresponding to the second H-shaped steel support 22 as the transfer position P2.
In addition, the second H-beam support 22 is disposed obliquely with respect to the first H-beam support 21, and one end of the second H-beam support 22, which is connected to the first H-beam support 21, is higher than the other end of the second H-beam support, which is away from the first H-beam support 21.
In the embodiment of the present invention, as shown in fig. 1, the length of the guide rail assembly 20 is at least 2 times the width of the historic well structure a, i.e., the first H-beam support 21 and the second H-beam support 22 are each at least 1 time the width of the historic well structure a.
In the embodiment of the present invention, the first H-shaped steel support 21 and the second H-shaped steel support 22 are provided with a vertical connecting plate (not shown) at the steel joint, and are provided with round holes with a diameter of about 2 centimeters for penetrating a hoisting steel wire rope, so as to hoist the first H-shaped steel support 21 and the second H-shaped steel support 22 into the construction foundation pit B1 for installation.
Referring to fig. 1, the back-up power assembly 30 is fixedly disposed at one side of the home position P1 toward the back cover steel plate 16. Specifically, the back-jacking power assembly 30 includes a back-jacking steel beam 31 and a hydraulic jack 32, two ends of the back-jacking steel beam 31 are fixedly connected with the pit wall of the foundation pit B1, the back-jacking steel beam 31 is located on one side of the original location position P1 and is arranged in a criss-cross manner on the plane with the migration route, and the hydraulic jack 32 is fixedly arranged on the back-jacking steel beam 31 in a pushing manner towards the historic well structure a.
In the embodiment of the present invention, as shown in fig. 1, at least two hydraulic jacks 32 are fixedly arranged on the back-jacking steel beam 31, and the hydraulic jacks 32 are horizontally located in the vertical space between the two first H-shaped steel supports 21.
As shown in fig. 1 and 3, the bracket 40 is disposed at the transfer position P2; the hoisting bracket 40 is used for supporting the ancient well structure A and the well wall stabilizing assembly 10 to be hoisted out of the pit. Specifically, the hoisting bracket 40 comprises two first i-steel supports 41 and a plurality of second i-steel supports 42 fixedly connected between the two first i-steel supports 41; the lifting bracket 40 is disposed at the transfer position P2.
Therefore, the historic well structure A and the well wall stabilizing assembly 10 are pushed by the hydraulic jack 32, and slide to the transfer position P2 from the original position P1 along the guide rail assembly 20, and are welded with the hoisting bracket 40, so that the historic well structure A, the well wall stabilizing assembly 10 and the hoisting bracket 40 form an integral hoisting pit.
In the embodiment of the present invention, the components are all connected by welding, for example, the outer casing 13 is connected to the back cover steel plate 16, the back cover steel plate 16 is connected to the hoisting bracket 40, and the first i-steel support 41 is connected to the second i-steel support 42.
The above describes an embodiment of the overall migration and modification structure of the small-sized old well structure, and the following description refers to fig. 1 to 3 to describe the steps of the overall migration and modification method of the small-sized old well structure.
As shown in fig. 1 to 3, the steps of the overall migration and modification method for the small-sized old well structure in the invention include:
pre-construction deployment step S1: determining an original position P1 and a transfer position P2 of a migration and diversion route of the ancient well structure A;
ancient well position exploration step S2: removing floating soil in a range of 10 +/-5 meters around the position where the ancient well structure A may be located, then, layering, scraping the soil downwards to remove the range of a foundation pit B1, and meanwhile, carrying out artificial exploration to confirm the position of the ancient well structure A;
an inner and outer casing reinforcing step S3: hoisting an outer protective sleeve 13 to be sleeved at 30 +/-5 cm of the top of the ancient well structure A, and manually cutting soil to remove redundant soil from the soil below the ancient well structure A, so that the space between the outer ring wall A3 of the ancient well and the outer protective sleeve 13 is filled with original soil to form an outer backfill layer 14; cleaning the filling soil in the pit after the outer casing 13 is in place, then hoisting the inner casing 11 into the pit, and filling the middle sand between the inner annular wall A2 of the ancient well and the inner casing 11 by adopting a hydraulic tamping method to form an inner backfill layer 12;
rail mounting step S4: excavating partial soil bodies on two opposite sides of the bottom of the ancient well structure A according to the extending direction of the migration and diversion route, and placing a guide rail assembly 20 in the excavated space of the soil bodies, wherein the guide rail assembly 20 comprises a first H-shaped steel support 21 and a second H-shaped steel support 22, the first H-shaped steel support 21 is oppositely arranged and located at the original position P1, the second H-shaped steel support 22 is oppositely arranged and located at the transfer position P2, and the transfer position P2 is provided with a hoisting support bracket 40; in addition, a soil body with the thickness of 1.5 +/-0.5 centimeters is reserved between the upper surface of the guide rail assembly 20 and the bottom of the outer casing 13;
a sealing steel plate packaging step S5: a high-pressure water gun is adopted to flush and cooperate with a steel wire rope of a rope saw, and soil between the guide rail assembly 20 and the outer protective cylinder 13 is removed in sections; then, utilizing a back jacking power assembly 30 fixedly arranged on the wall of a construction foundation pit B1, sequentially jacking and inserting a back cover steel plate 16 into a space formed after soil is removed in a segmented manner, and after the back cover steel plate 16 is positioned to seal the bottom opening of the outer casing 13, welding and fixing the bottom of the outer casing 13 and the back cover steel plate 16, so that the inner casing 11, the inner backfill layer 12, the outer casing 13, the outer backfill layer 14, the inner pressure steel plate 15 and the back cover steel plate 16 jointly form a well wall stabilizing assembly 10 covering the exterior of the historic well structure A;
step S6 of ancient well construction pushing and sliding: pushing the bottom-sealing steel plate 16 by using the back-pushing power assembly 30, so that the integrated paleo-well structure a and the well wall stabilizing assembly 10 slide along the guide rail assembly 20 from the home position P1 to the transfer position P2 by using the bottom-sealing steel plate 16 until the integrated paleo-well structure a and the well wall stabilizing assembly 10 slide to the lifting bracket 40 at the transfer position P2;
and a step S7 of fixedly connecting and hoisting the hoisting bracket: and after the hoisting bracket 40 and the bottom sealing steel plate 16 are welded and fixed to form a stable system, hoisting the ancient well structure A, the well wall stabilizing assembly 10 and the hoisting bracket 40 out of the pit simultaneously.
In the step S2 of exploring the position of the old well, when scraping earth downward in layers, the scraping thickness is not more than 20 ± 5 centimeters each time, and meanwhile, the artificial exploration is performed gradually, the ranges of the position of the solid earth and the position of the filled earth are determined, and the exploring position is reduced gradually; and finally, after the position of the ancient well structure A is determined, manually excavating to confirm the position of the ancient well structure A.
Specifically, in the step S3 of reinforcing the inner and outer casing, before reinforcing the construction casing, the slope is first set to dig a first layer of earthwork to a position about 1.3 meters below the pit opening of the well. The manual soil cutting is to achieve a rope saw effect by manually pulling the steel wire rope, and slowly cut off redundant soil; the outer backfill layer 14 is preferably composed of undisturbed soil with a thickness of 10 +/-5 cm. After the outer casing 13 is in place, the filling soil in the pit is cleaned until the inner part reaches the bottom of the pit, and the depth of the pit is rechecked after the inner part is dug to the bottom of the pit, so that the depth of the outer part needing to be dug is confirmed. Wherein, the bottom of the inner casing 11 is provided with a drain hole (not shown) closed by a dense mesh steel wire mesh, so that the residual water during the water ramming construction is discharged through the drain hole; preferably, a small self-priming pump can be used to pump out the residual water. And the step S3 of reinforcing the inner and outer casing is used for ensuring the stability of the wall of the ancient well and avoiding the adverse effect on the wall of the ancient well caused by shaking during hoisting.
In the step S4 of installing guide rails, after the foundation pit B1 is excavated to the bottom elevation, partial soil on both sides of the bottom of the ancient well structure a is excavated to be placed with the guide rail assembly 20, the guide rail assembly 20 is arranged according to the diversion route, and the guide rail assembly 20 includes a guide rail portion (first H-shaped steel support 21) corresponding to the original position P1 and a guide rail portion (second H-shaped steel support 22) corresponding to the transfer position P2; preferably, the horizontal height of the second H-beam support 22 is lower than the horizontal height of the first H-beam support 21, and the horizontal height of the second H-beam support 22 has a height change inclined from high to low along the transition route direction, so that the ancient well structure a and the borehole wall stabilizing assembly 10 can smoothly slide from the original position P1 to the transfer position P2 by using the gravity of the ancient well structure a and the borehole wall stabilizing assembly 10 and the height change in the process of sliding the ancient well structure a and the borehole wall stabilizing assembly 10 to the transfer position P2 along the guide rail assembly 20.
When partial soil bodies on two sides of the bottom of the historic well structure A are dug, soil bodies with the thickness of 1.5 +/-0.5 centimeters are reserved between the bottom of the outer casing 13 and the upper surface of the guide rail assembly 20, so that the bottom opening of the outer casing 13 can be sealed later. More specifically, a soil body having a thickness of about 1.5 cm is preferably retained between the upper surface of the first H-beam support 21 and the bottom of the outer casing 13, and a soil body having a thickness of about 2 cm is preferably retained between the upper surface of the end of the second H-beam support 22 and the bottom of the outer casing 13. In addition, the guide rail mounting step S4 includes pressing a steel plate into the inner casing 11 until the steel plate is laid on the bottom of the pit (inner wall a4 of the well bottom).
In the sealing steel plate encapsulating step S5, it is preferable that when soil between the guide rail assembly 20 and the outer casing 13 is removed, the removed soil does not exceed 25 ± 5 centimeters in the advancing direction of the sealing steel plate 16 each time. In addition, the jacking power assembly 30 preferably includes 2 hydraulic jacks 32 to evenly push the back cover steel plate 16 to a desired position. Preferably, the back cover steel plate 16 is a steel plate with a thickness of about 1 ± 0.5 cm.
In the step S6, a plurality of brake pads (not shown) are welded on the upper surface of the second H-shaped steel support 22 at intervals, and when the ancient well structure a and the well wall stabilizing assembly 10 slide to abut against the brake pads in a segmented manner, the pushing movement is suspended until the abutting brake pads are removed, and then the next segment of displacement is performed until the ancient well structure a and the well wall stabilizing assembly 10 slide to the bracket hanger 40. Preferably, the brake pads are made of steel bar heads with the diameter of 12mm, and are welded on the second H-shaped steel support 22 at intervals of 30 +/-5 cm.
In the embodiment of the present invention, in order to smoothly slide the ancient well structure a and the well wall stabilizing assembly 10, which are formed as a whole, along the guide rail assembly 20 to the transfer position P2 for hoisting, the upper surfaces of the first H-shaped steel support 21 and the second H-shaped steel support 22 of the guide rail assembly 20, which are in contact with the bottom-sealing steel plate 16, are preferably coated with lubricating oil, so that the ancient well structure a automatically slides downwards and slowly by matching with the self-weight of the ancient well structure a and the pushing of the back-pushing power assembly 30.
In the step S7, the lifting bracket 40 is welded and fixed to the back cover steel plate 16, and then is fastened by steel strands for fastening and then lifted.
While the present invention has been described in detail and with reference to the accompanying drawings and examples, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (10)
1. A small and medium-sized old well structure integrally changes a structure, the old well structure is located in a construction foundation pit of a soil body; it is characterized in that the integral moving and modifying structure further comprises:
the well wall stabilizing assembly comprises an inner protective cylinder, an outer protective cylinder, an inner pressure steel plate and a bottom sealing steel plate which are used for packaging and stabilizing the ancient well structure;
the guide rail assembly is provided with two opposite end parts, one end part is defined as an original site position, the other end part is defined as a transfer position, and the ancient well structure and the well wall stabilizing assembly slide to the transfer position from the original site position along the guide rail assembly;
the back jacking power assembly is fixedly arranged on one side of the original site position towards the back cover steel plate in a pushing manner;
the hoisting bracket is arranged at the transfer position; the hoisting bracket supports the ancient well structure and the well wall stabilizing assembly to hoist and leave the pit.
2. The integral moving and modifying structure of the small and medium-sized ancient well structure according to claim 1, characterized in that:
the ancient well structure is formed with an inner annular wall, an outer annular wall, a bottom inner wall and a bottom outer wall;
in the well wall stabilizing assembly, the inner casing is arranged inside the ancient well structure, and the internal pressure steel plate is accommodated inside the inner casing and pressed on the inner wall of the well bottom; the outer protecting cylinder is arranged outside the ancient well structure, and the bottom sealing steel plate is welded and fixed with the bottom of the outer protecting cylinder to seal the bottom opening of the outer protecting cylinder;
the guide rail assembly comprises two first H-shaped steel supports which are arranged oppositely and two second H-shaped steel supports which are arranged oppositely; the end parts of the two first H-shaped steel supports and the two second H-shaped steel supports are connected to form a guide rail of a moving and changing route and are arranged on two opposite sides of the bottom of the historic well structure A; defining the part of the moving and changing route corresponding to the first H-shaped steel support as the original position, and defining the part of the moving and changing route corresponding to the second H-shaped steel support as the transfer position;
the back-jacking power assembly comprises a back-jacking steel beam and a hydraulic jack, wherein two ends of the back-jacking steel beam are fixedly connected with the pit wall of the construction foundation pit, the back-jacking steel beam is positioned on one side of the original site position and is arranged in a criss-cross manner on the plane with the migration route, and the hydraulic jack is fixedly arranged on the back-jacking steel beam in a pushing manner towards the historic well structure;
the hoisting bracket comprises two first I-shaped steel supports and a plurality of second I-shaped steel supports fixedly connected between the two first I-shaped steel supports; the hoisting support bracket is arranged at the transfer position;
therefore, the ancient well structure and the well wall stabilizing assembly are pushed by the hydraulic jack, and slide to the transfer position from the original position along the guide rail assembly and are welded with the hoisting bracket so as to integrally hoist the ancient well structure, the well wall stabilizing assembly and the hoisting bracket to form a pit.
3. The integral moving and modifying structure of the small and medium-sized ancient well structure according to claim 2, characterized in that:
an inner backfill layer is arranged between the inner protecting cylinder and the inner annular wall of the ancient well structure, and an outer backfill layer is arranged between the outer protecting cylinder and the outer annular wall of the ancient well structure.
4. The whole migration and modification structure of the small and medium-sized old well structure according to claim 1 or 2, characterized in that:
the inner protective cylinder is an HDPE double-wall corrugated pipe protective cylinder, and the outer protective cylinder is a steel annular protective cylinder.
5. The whole migration and modification structure of the small and medium-sized old well structure according to claim 1 or 2, characterized in that:
and a drain hole is formed in the bottom end cylinder wall of the inner protective cylinder and is closed by a dense mesh steel mesh.
6. The integral moving and modifying structure of the small and medium-sized ancient well structure according to claim 2, characterized in that:
at least two hydraulic jacks are fixedly arranged on the back jacking steel beam, and the hydraulic jacks are horizontally arranged in a vertical space between the two first H-shaped steel supports.
7. The integral moving and modifying structure of the small and medium-sized ancient well structure according to claim 1, characterized in that:
the second H-shaped steel support is obliquely arranged relative to the first H-shaped steel support, and one end, connected with the first H-shaped steel support, of the second H-shaped steel support is higher than the other end, far away from the first H-shaped steel support.
8. A method for integrally moving and modifying a small and medium-sized ancient well structure is characterized by comprising the following steps:
pre-construction deployment step S1: determining an original site position and a transfer position of the ancient well structure migration and transformation route;
ancient well position exploration step S2: removing floating soil in a range of 10 +/-5 meters around the possible position of the ancient well structure, then scraping soil downwards in layers to clear the range of a foundation pit, and simultaneously performing artificial exploration to confirm the position of the ancient well structure;
an inner and outer casing reinforcing step S3: hoisting an outer protective sleeve at 30 +/-5 cm from the top of the ancient well structure, and removing redundant soil from the lower soil body by adopting manual soil cutting to fill the space between the outer ring wall of the ancient well and the outer protective sleeve with original soil to form an outer backfill layer; cleaning the filling soil in the pit after the outer protective cylinder is in place, and then hoisting the inner protective cylinder into the pit, so that the middle sand is filled between the inner annular wall of the ancient well and the inner protective cylinder by adopting a water ramming method to form an inner backfill layer;
rail mounting step S4: excavating partial soil bodies on two opposite sides of the bottom of the ancient well structure according to the extending direction of the migration and diversion route, and placing a guide rail assembly in a space after the soil bodies are excavated, wherein the guide rail assembly comprises a first H-shaped steel support which is oppositely arranged and is positioned at the original site position and a second H-shaped steel support which is oppositely arranged and is positioned at the transfer position, and the transfer position is provided with a hoisting support bracket; in addition, soil with the thickness of 1.5 +/-0.5 cm is reserved between the upper surface of the guide rail assembly and the bottom of the outer protective cylinder;
a sealing steel plate packaging step S5: a high-pressure water gun is adopted to flush and cooperate with a steel wire rope of the rope saw, and soil between the guide rail assembly and the outer protective cylinder is removed in sections; secondly, sequentially pushing and inserting a back cover steel plate into a space formed after soil is removed in a segmented manner by utilizing a back jacking power assembly fixedly arranged on the wall of the foundation pit, and welding and fixing the bottom of the outer casing and the back cover steel plate after the back cover steel plate is in place to close the opening at the bottom of the outer casing, so that the inner casing, the inner backfill layer, the outer casing, the outer backfill layer, the inner pressure steel plate and the back cover steel plate form a well wall stabilizing assembly coated outside the ancient well structure together;
step S6 of ancient well construction pushing and sliding: pushing the bottom sealing steel plate by using the back jacking power assembly to enable the bottom sealing steel plate to slide from the original site position to the transfer position along the guide rail assembly until the integral ancient well structure and the well wall stabilizing assembly slide to the lifting bracket at the transfer position;
and a step S7 of fixedly connecting and hoisting the hoisting bracket: and after the hoisting support bracket and the bottom sealing steel plate are welded and fixed to form a stable system, hoisting the historic well structure, the well wall stabilizing assembly and the hoisting support bracket out of the pit simultaneously.
9. The method for integrally migrating and modifying the small and medium-sized ancient well structure according to claim 8, wherein the method comprises the following steps:
in the step S6, a plurality of brake pads are welded on the upper surfaces of the second H-shaped steel supports at intervals, and when the ancient well structure and the well wall stabilizing component slide to abut against the brake pads in a segmented manner, the pushing movement is suspended until the abutting brake pads are removed, and then the next segment of displacement is performed until the ancient well structure and the well wall stabilizing component slide to the hoisting bracket.
10. The method for integrally migrating and modifying the small and medium-sized ancient well structure according to claim 8, wherein the method comprises the following steps:
in the guide rail mounting step S4, the horizontal height of the second H-beam support is lower than the horizontal height of the first H-beam support, and the horizontal height of the second H-beam support has a height change that is inclined from high to low along the transition route direction.
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| CN112854813A (en) * | 2021-01-12 | 2021-05-28 | 杭州圣基建筑特种工程有限公司 | Profile steel tray structure for ancient building translation and underpinning method |
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| US3529387A (en) * | 1967-04-25 | 1970-09-22 | Gottlieb Fritz Huber | Apparatus for constructing buildings having several storeys |
| CN101294447A (en) * | 2007-04-23 | 2008-10-29 | 上海市城市建设设计研究院 | Buildings pile underpinning method |
| CN101429820A (en) * | 2007-11-07 | 2009-05-13 | 上海天演建筑物移位工程有限公司 | Integral shift method for buildings |
| US20090232623A1 (en) * | 2008-03-11 | 2009-09-17 | The Mattamy Corporation | Roof hoist |
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