WO2014015739A1

WO2014015739A1 - Inspection well apparatus resistant to differential settlement and method of constructing same

Info

Publication number: WO2014015739A1
Application number: PCT/CN2013/078323
Authority: WO
Inventors: 庞学雷
Original assignee: Pang Xuelei
Priority date: 2012-07-25
Filing date: 2013-06-28
Publication date: 2014-01-30
Also published as: CN102767191A

Abstract

Disclosed is an inspection well apparatus resistant to differential settlement, comprising a well cover (1) and a well body (2), wherein a bearer plate (3) is provided underneath the well cover (1), a well cover placement hole (31) being formed on the bearer plate (3), and the area of the bearer plate (3) facing a well body top opening (21) being at least greater than an area formed by the outer edge of the well body top opening (21). The bearer plate (3) is located above the well body top opening (21) and the lower surface thereof is separated from the well body top opening (21). Raising blocks (4) are provided underneath the outer edge of the bearer plate (3) in such a way as to support the bearer plate, a part of the raising blocks (4) going beyond the outer edge of the bearer plate (3). Even though the inspection well apparatus serves to repeatedly bear the load of vehicles for a long time, the apparatus can still prevent differential settlement of the well cover and the well body relative to peripheral roads. Moreover, the present invention further provides a method of constructing such an inspection well apparatus resistant to differential settlement.

Description

Well-dwelling device resistant to differential settlement and construction method thereof

Technical field

The invention relates to the technical field of urban road construction and construction, in particular to a well device capable of resisting differential settlement and a construction method thereof. Background technique

The construction of a large number of roads in urban construction is often accompanied by various types of public pipeline facilities. From the perspective of saving land resources, the planning department often arranges such pipelines, especially rainwater and sewage pipelines, within the scope of roads. For maintenance requirements, it is necessary to set up an inspection well (manhole) at regular intervals so that relevant construction personnel can enter the work. Usually, the manhole cover of such a well is directly placed on the well body, and since the well body is located under the lane, after the manhole cover is subjected to the vehicle load, the load is transmitted to the manhole cover, the well body, and then directly transmitted to the soil foundation, in the long-term load. Under the action, the soil foundation is compressed, resulting in the sinking of the well body and the manhole cover. In addition, the building materials of the well body are generally bricks or blocks that are built with binders. When the well body is compressed, the binders are squeezed out, and the well body itself is compressed, which also causes the manhole cover to sink. In general, the sinking of the manhole cover causes local normal cracking of the surrounding road surface, shortens the service life of the road, and poses problems for driving safety and comfort.

The applicant has proposed a basic method for solving such problems in the utility model patent No. 92234613.5 "an anti-settling composite manhole cover". After nearly two decades of use and promotion, it has achieved certain effects and solved it better. The problem of anti-sedimentation in the well. At the same time, however, due to the settlement of the road itself, the combined manhole cover cannot sink down when the road descends, resulting in differential settlement between the two. After several years of use, it will be generated on the road around the manhole cover. Cracking. Secondly, the oversized and buried shallow carrier plate, when the vehicle wheel load acts on one side (angle) of the carrier plate, will produce a certain amount of short-term compression deformation at this position, and the corresponding side (angle) will be generated. Reverse deformation, under repeated vehicle loads, also causes cracks along the road at the corners of the load-bearing plate; further, the manhole cover seat placed on the load-bearing plate needs to ensure the road and the road to ensure the smoothness of the road The pavement is on the same level and cannot be fixed directly to the load-bearing plate in advance, but can only be fixed with cement mortar slurry after the construction of the load-bearing plate is completed. Since it is squeezed and pushed by the vertical load and horizontal force of the vehicle after the road is opened, after a certain period of time, the manhole cover does not have sufficient resistance to horizontal pushing due to its bonding mortar with the support plate. Loose, causing horizontal displacement of the manhole cover, resulting in road surface fragmentation or oblique settlement around the manhole seat.

In addition, another anti-settling manhole cover that is currently in use, because only the widened circular (or rectangular) well frame is used, solves the problem of flatness of the well seat (cover) consistent with the road plane, but it is not solved. Anti-settling problem under load at the entire well location. Repeated vehicle in the long run Under the action of the load and the horizontal thrust of the vehicle, cracking and differential settlement of the road around the well seat and/or the well body will still occur. Summary of the invention

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a wellbore device that is resistant to differential settling, which can avoid differential settlement of the manhole cover and/or the wellbore and surrounding roads even under long-term repeated vehicle loads. At the same time, the invention also provides a construction method of the anti-difference settlement well-sinking device.

It is a further object of the present invention to provide a well-sinking device that is resistant to differential settling, preventing horizontal displacement of the manhole cover even under repeated long-term vehicle horizontal thrust, thereby avoiding cracking of the road around the wellbore.

In order to achieve the above object, the present invention provides a well prevention device for differential settlement, comprising a manhole cover and a well body, a support plate is disposed below the manhole cover, and the support plate is formed with a well cover placement hole, the support plate The area opposite to the upper opening of the well body is at least larger than the area formed by the outer edge of the upper body of the well body; the support plate is located above the upper opening of the well body and the lower surface thereof is separated from the upper mouth of the well body; The utility model is characterized in that a spacer is arranged below the outer edge of the support plate to support the outer edge of the support plate, and a part of the spacer extends beyond the outer edge of the support plate.

Preferably, the width of the portion of the spacer beyond the outer edge of the support plate is substantially equal to the thickness of the support plate

Preferably, the manhole cover comprises a manhole cover body and a collar portion; and, the support plate further comprises a manhole cover sleeve seat, and the manhole cover ring sleeve fits snugly with the well cover collar.

Preferably, the manhole cover sleeve is disposed on the upper surface of the support plate and has a height such that it forms a height together with the upper cover collar and the cover body, and ensures the upper part of the support The pavement structure layer has a certain thickness.

Preferably, the manhole cover sleeve is a recess formed on an inner wall of the manhole placement hole of the support plate, and the sleeve cover is longitudinally dimensioned to extend into the well cover placement hole. Fitted with the manhole cover sleeve.

Preferably, the manhole cover is formed in the form of an open sheath having a wide edge at the upper opening. According to the present invention, there is also provided a construction method for the above-mentioned anti-difference settlement well-sinking device, comprising:

Putting a bonding material such as cement mortar near the upper mouth of the well body, in the subgrade area where the spacer is to be placed; laying a prefabricated concrete or reinforced concrete pad on the outer peripheral edge area of the well body on the subgrade area And filling the outer space of the pad with a bonding material such as cement mortar, and smearing; mounting the prefabricated reinforced slab support plate on the pad, and a part of the pad extends beyond the outer edge of the support plate, such as a bonding material such as cement mortar fills the gap between the layer and the structural layer of the road, Ping; carry out the construction of asphalt pavement on the road surface, and at the same time place the cover cover ring sleeve, and use the road roller to compact the manhole cover ring with the asphalt pavement of the road surface, so that the wide edge of the manhole cover ring is flush with the road surface.

Preferably, the method further comprises laying the spacer against the outer edge of the upper body of the well body on the subgrade area.

Preferably, the method further comprises placing a retaining ring along the outer edge of the upper edge of the well body before the step of laying the prefabricated concrete or reinforced concrete block on the outer edge region of the upper body of the well body. The upper edge of the earth ring is higher than the upper edge of the well.

Preferably, the bonding material such as the cement mortar comprises a quick-drying cement crucible or a resin crucible. With the above structure, the differential settlement-resistant well-sinking device of the present invention can disperse the load received by the manhole cover into the road structural layer rather than being transferred into the soil foundation, thereby preventing the well-sinking device from being compared with the prior art device. Overall settlement; Moreover, the deformation of the manhole cover, the support plate and the road surface are always consistent, which overcomes the differential settlement between the manhole cover and the road surface, does not cause the cracking and settlement of the road around the well device, and can improve the reliability of the differential settlement. Sexuality also solves the problem of the flatness of the manhole cover placed on the support plate and the road surface.

In addition, it also solves the problem of peripheral road surface fragmentation caused by horizontal displacement and/or differential settlement of the manhole cover under the action of long-term wheel horizontal thrust.

The apparatus and method of the present invention are not only suitable for the construction of wells for newly built roads, but also for the rapid maintenance and modification of existing wells in open road traffic in the case of using quick-drying cement concrete and elastic asphalt concrete. BRIEF DESCRIPTION OF THE DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a longitudinal sectional view of a first embodiment of a well prevention device for differential settlement according to the present invention; Fig. 2 is a longitudinal sectional view of a second embodiment of a well prevention device for differential settlement according to the present invention; and Fig. 3 is a differential sectional and horizontal displacement of the present invention. Longitudinal sectional view of the first embodiment of the well device;

Figure 4 is a partial enlarged view of the first embodiment shown in Figure 3;

Figure 5 is a longitudinal cross-sectional view of the second embodiment of the well-sinking device of the present invention against differential settlement and horizontal displacement;

Figure 6 is a partial enlarged view of the second embodiment shown in Figure 5. detailed description

As shown in FIG. 1 , the differential settlement-resistant well-sinking device of the present invention comprises a manhole cover 1 and a well body 2, and a support plate 3 supporting the manhole cover 1 is disposed below the manhole cover 1, and a cover cover placement hole 31 is formed on the support plate 3, The area of the support plate 3 opposite to the upper opening 21 of the well body (without deducting the placement hole of the support plate cover) The area of 31) is at least larger than the area formed by the upper opening 21 of the well body (including the well body wall and the intermediate cavity portion), that is, the area formed by the outer casing size. The support plate 3 is located above the upper opening 21 of the well body and its lower surface is separated from the upper opening 21 of the well body, typically maintaining a spacing of about 5-10 cm. With such a structure, the support plate 3 is located in the pavement structure layer, and the load received by the manhole cover 1 is completely dispersed into the pavement structure layer by the portion in contact with the pavement structure layer. In the prior art, in order to achieve an effective dispersive load effect, the support plate 3 tends to be about 50-80 cm beyond the edge of the upper opening 21 of the well body, and in order to obtain an effective dispersing load for a relatively long period of time, practical use is approached. The upper limit of the support plate size, that is, the support plate 3 is about 60-80 cm beyond the edge of the upper opening 21 of the well body. With such a structure, although it is possible to resist the settlement of the well body, the area of the support plate 3 is too large, on the one hand, the construction cost is increased, and on the other hand, in the case where the pavement structure itself is settled, differential settlement occurs, resulting in a support plate. The problem of cracking the road surface.

In order to avoid the load on the manhole cover 1 from being completely received by the support plate 3 in the prior art, the support plate 3 has to be made much larger than the area of the manhole cover 1 to cause differential settlement, as shown in FIG. Below the outer edge of the panel 3, a spacer 4 is provided in a manner to support the support panel, a portion of which is beyond the outer edge of the support panel 3. This spacer 4 acts as a force transmission. By means of the spacer 4, it is possible to reduce the area of the support plate 3, and at the same time, the upper and lower deformation ranges of the edge of the support plate 3 under load are reduced, and the cracking of the road surface edge and the edge of the support plate is prevented or reduced. .

Preferably, the spacer 4 is made of tantalum or reinforced concrete, and FRP or steel can also be used. Generally, the thickness of the spacer is in the range of 15-40 cm, or the thickness of the spacer is selected to be adapted to the distance between the lower surface of the support plate 3 and the upper opening 21 of the well body, as needed, for example, larger than the lower surface of the support plate 3. The distance from the upper opening 21 of the well body simultaneously serves to prevent the roadbed material from entering the well body.

Further, the width L of the portion of the spacer 4 beyond the outer edge of the support plate 3 is substantially equal to the thickness H of the support plate 3, so that from the longitudinal sectional view of Fig. 1, the upper edge of the outer edge of the support plate and the upper edge of the outer edge of the spacer The angle between the line and the vertical is approximately equal to 45 degrees.

Further, as shown in Fig. 2, a second embodiment of the well-sinking apparatus for differential settlement according to the present invention is shown. Since in this embodiment, the retaining ring 5 is provided between the lower surface of the support plate 3 and the distance from the upper hole 21 of the well body and the pavement structure close to the outer side of the upper opening 21 of the well body, the thickness of the block 3 is You can choose freely according to your needs.

Referring to Figures 3 and 4, there is shown a first embodiment of the well-sinking apparatus of the present invention which is resistant to differential settlement and horizontal displacement. In this embodiment, the structure of the spacer 4 is the same as that of the foregoing embodiment, and the description thereof will not be repeated. Further, in the present embodiment, the manhole cover 1 includes a manhole cover body 1 1 and a collar portion 12, and the manhole cover body 1 1 and the manhole cover ring 12 may be separately made of different materials and capped together or joined together as needed. To the role of positioning and opening, or can be made of the same material as a single piece or by phase The same materials are separately made and joined together to play the role of positioning and opening.

At the same time, the support plate 3 is provided with a manhole cover sleeve 32 which is consolidated or integrated with the support plate, and the manhole cover sleeve 32 is fitted with the manhole cover sleeve 21, thereby blocking the level of the manhole cover sleeve 21 Displacement, overcoming the horizontal thrust of the vehicle.

At the same time, the manhole cover sleeve 32 is disposed on the upper surface of the support plate 3 and has a height such that it forms a height P with the upper manhole cover 12 and the manhole cover 11 to ensure that the support plate 3 has a certain distance from the road surface. The distance is such that the pavement structure layer on the upper part of the support plate 3 has a certain thickness, and the edge cracking due to the rigidity of the support plate 3 and the unevenness of the road surface structure of the periphery and the support plate portion is eliminated, and the road surface on the support plate 3 is eliminated. The problem of easy chipping caused by the thinner structural layer.

Further, as shown in Figs. 5 and 6, the second embodiment of the well-sinking apparatus for differential settlement and horizontal displacement of the present invention is shown. The difference from the embodiment shown in Figs. 3 and 4 is that the cover ring sleeve 32 included in the support plate 3 is a recess formed on the inner wall of the manhole placement hole 31 of the support plate 3, and the longitudinal length dimension of the manhole cover 12 is It can be inserted into the manhole placement hole to fit the manhole cover sleeve 32.

In the embodiment illustrated in Figures 3-6, the manhole cover 12 is formed in the form of an open jacket having a wide edge 121 at its upper mouth. The manhole cover 1 1 is placed in the manhole cover 12 or may be formed separately or integrally from the same material. The system consisting of the manhole cover 12 and the manhole body 1 1 adopts a relatively suspended structure, that is, not directly coupled to the support plate 3, but only to the side of the ring cover 32 or the recess 32 on the inner wall of the manhole placement hole 31. Correspondence, fit and fit.

Additionally, the wide edge 121 of the manhole cover 12 can be placed flush with the road surface. During construction and installation, because the manhole cover 12 has a certain width on the road surface, it is easy to install to be flush with the road surface, which increases the smoothness of the road, and also because the manhole cover 12 has a certain width, and also the road surface around it. Protection is generated to prevent horizontal impact and prevent fragmentation of the surrounding road surface. Under the load, the wide edge 121 of the manhole cover 12 flush with the road surface can also transfer part of the load to the pavement structure layer, and then distribute the load to the soil roadbed again through the support plate 3.

The above structure works under the load of the vehicle as described below and prevents differential settlement and horizontal displacement:

When the vehicle enters the area inside the outer edge of the block 4, the load is first transmitted to the force transmission block through the road structure above the force transmission block 4, and then transmitted to the roadbed structure, which is due to other road structures. There is no big difference, and the force-transmitting pad is in the subgrade, and it will not cause cracks at its edges, resulting in uneven settlement with other parts of the road. When the vehicle moves forward, the load enters the area of the support plate 3 due to The support plate 3 is kept at a certain thickness away from the road surface, and the road structure in the height range of the surface of the support plate and the road surface is substantially consistent with the surrounding road under the load. And the area of the support plate 3 is small, under the load, the plate The deformation of the edge is small, and cracks are not easy to occur. The main vehicle load is transmitted to the support plate through the part of the road surface, and then transmitted to the roadbed structure through the force transmission block, effectively distributing the load without transmitting the load to the well body 2 On the top, the simultaneous settlement with the surrounding road is realized; when the vehicle load enters the area of the manhole cover 12 and the cover body 1 1 , the load is first transmitted to the surrounding pavement structure through the wide edge 121 of the cover cover 12 and then passed. This part of the road surface is transmitted to the support plate 3. The load is then transmitted through the support plate 3 to the spacer 4 into the subgrade structure. That is, through the two-way "suspended structure" (the upper cover structure composed of the manhole cover body 1 and the manhole cover sleeve 12 and the lower suspension structure composed of the support plate 3 and the block 4), the secondary load is dispersed, and the vehicle load is transmitted to the roadbed. In the structure, it is ensured that the road surface around the well body is consistent with the road surface of other areas. At the same time, the horizontal action of the vehicle on the manhole cover body 1 1 and the manhole cover ring 12 is due to the fact that the manhole cover ring 12 and the manhole cover sleeve 32 are relatively flanked together (or the manhole cover sleeve 12 penetrates into the cover plate of the support plate 3 to be placed on the inner wall recess 32). Above), the manhole cover sleeve 32 (or the side wall of the manhole placement hole) limits the horizontal pushing of the manhole cover 12, thereby preventing the horizontal pushing of the manhole cover 12 against the pavement layer and the road surface fragmentation. At the same time, since the wide edge 121 of the manhole cover 12 is consistent with the road surface, the impact of the vehicle in the horizontal direction is prevented, and the joint portion with the road surface leaves the load stress concentration region of the edge as the width of the wide edge 121 increases. In the general pavement structure layer, the road surface of the joint portion is protected, and the crack of the road surface is prevented. When the vehicle leaves the area of the well, it operates in the reverse order of the above. According to the above principle, the purpose of the differential well settlement and horizontal displacement of the well can be achieved.

Preferably, since the spacer 4 is used under the support plate 3, in addition to the structure and method may be used on the newly built road, the adhesive bonding material such as quick-drying cement may be combined in the repair and modification of the existing road. The renovation or maintenance is completed in time, and the traffic is opened. Therefore, the construction method according to the concept of the present invention is as follows:

Put a quick-drying cement concrete or resin crucible near the upper mouth of the well body and place the pad in the subgrade; place a prefabricated concrete or reinforced concrete block on the outer edge of the upper body of the well body, and then The outer space of the block is clogged with quick-drying or resin crucible, and is smoothed;

The prefabricated reinforced concrete support plate is mounted on the block, and a part of the block extends beyond the outer edge of the support plate, and the gap between the block and the road structure layer is blocked by quick drying or resin squeezing;

The pavement asphalt pavement is constructed. At the same time, the manhole cover ring sleeve is placed, and the manhole cover ring sleeve is rolled and formed with the road asphalt bitumen by the road roller, so that the wide edge of the manhole cover ring is flush with the road surface.

As shown in Fig. 3, preferably, the spacer is placed on the outer peripheral edge region of the well body and is placed on the subgrade region, so that it is not necessary to provide the retaining ring 5.

In addition, preferably, a retaining ring 5 is placed along the outer edge of the upper edge of the well body before the step of laying the prefabricated concrete or reinforced concrete block on the outer peripheral edge of the well body. Circle 5 The upper edge is higher than the upper opening of the well, as shown in Figure 2.

Preferably, if a special elastic asphalt concrete is used in the repair and reconstruction, the repair area can be more protected without road surface fragmentation. Generally, such repair and reconstruction time can be completed in one night, and does not have a large impact on the traffic of vehicles on existing roads. In addition, when retrofitting or repairing an existing well device, the road surface around the well is first removed and the existing support plate is removed.

For the construction of the wells on the newly built roads, the construction time is relatively sufficient, and quick-drying or resin crucibles may not be used to save the cost.

Claims

Claim

A well-removing device for differential settlement, comprising a manhole cover (1) and a well body (2), a support plate (3) is disposed below the manhole cover (1), and the support plate (3) is formed with a manhole cover hole (31), an area of the support plate (3) opposite to the upper body port (21) is at least larger than an area formed by an outer edge of the upper body (21); the support plate (3) ) is located above the upper body (21) of the well body and its lower surface is separated from the upper body (21) of the well body; characterized in that it is supported below the outer edge of the support plate (3) A spacer (4) is provided in the manner of the outer edge of the panel, a portion of which is beyond the outer edge of the support panel (3).

2. The differential settlement-resistant well-staying device according to claim 1, wherein a width (L) of the portion of the spacer (4) beyond an outer edge of the support plate (3) is substantially the same as The thickness (H) of the support plate (3) is equal

3. The differential settlement-resistant well-sinking device according to claim 1 or 2, wherein the manhole cover (1) comprises a manhole cover body (11) and a collar portion (12); and, the support plate (3) Also included is a manhole cover sleeve (32) that mates with the manhole cover (21).

4. The differential settlement-resistant well-sinking device according to claim 3, wherein the manhole cover sleeve (32) is disposed on an upper surface of the support plate (3) and has a height such that it is above The manhole cover (12) and the manhole body (11) together form a height to ensure that the pavement structure layer on the upper portion of the support plate (3) has a certain thickness (P).

5. The differential settlement-resistant well-sinking device according to claim 3, wherein the manhole cover sleeve (32) is formed on an inner wall of the manhole placement hole (31) of the support plate (3) The recess of the manhole cover (21) is sized to extend into the manhole placement hole (31) for mating engagement with the manhole cover sleeve (32).

6. The differential settlement resistant well boring device of claim 1, wherein the well cover collar (12) is formed in the form of an open jacket having a wide edge (121) at the upper opening.

7. The construction method of the differential settlement prevention well-discharging device according to claim 1, comprising: placing a bonding material such as cement mortar near the upper mouth of the well body and in the road base area where the spacer (4) is to be placed;

Prefabricating ramming or reinforced concrete lining blocks are laid on the outer peripheral edge area of the well body on the roadbed area, and then the outer space of the lining block is filled with a bonding material such as cement mortar, and smeared; The reinforced concrete support plate is mounted on the block, and a part of the block extends beyond the outer edge of the support plate, and then the gap between the reinforced concrete and the road structure layer is filled with a bonding material such as cement mortar, and is smoothed; The pavement asphalt pavement is constructed. At the same time, the manhole cover ring sleeve is placed, and the manhole cover ring sleeve is rolled together with the asphalt pavement of the road surface by the road roller, so that the wide edge of the manhole cover ring is flush with the road surface.

The construction method according to claim 7, wherein the spacer is placed on the roadbed area against the outer edge of the upper body of the well body.

9. The construction method according to claim 8, wherein before the step of laying a prefabricated concrete or reinforced concrete sill in the outer edge region of the upper body of the well body on the roadbed region, The retaining ring (5) is placed on the edge, and the upper edge of the retaining ring is higher than the upper opening of the well body.

The construction method according to claim 7, wherein the cement mortar or the like comprises a quick-drying cement crucible or a resin crucible.